Ring Magazine Champions by Division, 1922–2026
All 423 Ring magazine championship reigns across 17 weight divisions since 1922: champion, dates, days held and defenses, with the median reign per division.
Vince Okonkwo
· 1 min read
The Ring has named its own champion in each weight class since it first recognized Jack Dempsey at heavyweight in 1922. This table lists all 423 Ring championship reigns across 17 divisions, with the start and end dates as the source prints them, the reign length in days computed from those dates, and the number of defenses. 6 reigns were still active on 13 September 2026.
Sort any column or search the table; download the CSV below the table.
Reigns
423
17 divisions; 6 champions current at retrieval
Median Reign
420 days
Across 395 completed reigns with full dates
Longest Reign
4,270 days
Joe Louis, heavyweight, 1937–1949
Most Defenses
26
Joe Louis, heavyweight
A Ring Heavyweight Champion Lasts 2.4 Times as Long as a Junior Lightweight Champion
For each division we took every completed reign with a full start and end date and found the median length, the middle value when the reigns are lined up shortest to longest. Heavyweight has the longest-lasting champions: a median of 740 days over 27 measured reigns. Junior lightweight has the shortest at 304 days over 20 reigns, 2.4 times shorter. Across all 395 measured reigns the median is 420 days.
Reigns have run longer in the modern era. Completed reigns that began before 1990 have a median of 390 days (n=293); those beginning in 1990 or later have a median of 524 days (n=102). The 6 current champions are excluded because their reigns are unfinished, and 22 completed reigns whose source dates lack a day are excluded as unmeasured.
Median Reign Length by Division
One dot per division with at least 10 measured reigns (12 of 17); super middleweight, junior featherweight, junior bantamweight, junior flyweight, strawweight have too few completed reigns to rank. Hover a dot for the value.
All Ring Championship Reigns by Division
Showing 423 of 423 rows
| Division▼ | No.▼ | Champion▼ | Began▼ | Begin Year▼ | Ended▼ | End Year▼ | Days▼ | Defenses▼ | Note▼ |
|---|---|---|---|---|---|---|---|---|---|
| Heavyweight | 1 | Jack Dempsey | 1922 | 1922 | 23 Sep 1926 | 1926 | — | 2 | awarded inaugural title |
| Heavyweight | 2 | Gene Tunney | 23 Sep 1926 | 1926 | 31 Jul 1928 | 1928 | 677 | 2 | — |
| Heavyweight | 3 | Max Schmeling | 12 Jun 1930 | 1930 | 21 Jun 1932 | 1932 | 740 | 1 | def. Jack Sharkey |
| Heavyweight | 4 | Jack Sharkey | 21 Jun 1932 | 1932 | 29 Jun 1933 | 1933 | 373 | 0 | — |
| Heavyweight | 5 | Primo Carnera | 29 Jun 1933 | 1933 | 14 Jun 1934 | 1934 | 350 | 2 | — |
| Heavyweight | 6 | Max Baer | 14 Jun 1934 | 1934 | 13 Jun 1935 | 1935 | 364 | 0 | — |
| Heavyweight | 7 | James J. Braddock | 13 Jun 1935 | 1935 | 22 Jun 1937 | 1937 | 740 | 0 | — |
| Heavyweight | 8 | Joe Louis | 22 Jun 1937 | 1937 | 1 Mar 1949 | 1949 | 4,270 | 26 | — |
| Heavyweight | 9 | Ezzard Charles | 27 Sep 1950 | 1950 | 18 Jul 1951 | 1951 | 294 | 4 | def. Joe Louis |
| Heavyweight | 10 | Jersey Joe Walcott | 18 Jul 1951 | 1951 | 23 Sep 1952 | 1952 | 433 | 1 | — |
| Heavyweight | 11 | Rocky Marciano | 23 Sept 1952 | 1952 | 27 Apr 1956 | 1956 | 1,312 | 6 | — |
| Heavyweight | 12 | Floyd Patterson | 30 Nov 1956 | 1956 | 26 Jun 1959 | 1959 | 938 | 4 | def. Archie Moore |
| Heavyweight | 13 | Ingemar Johansson | 26 Jun 1959 | 1959 | 29 Jun 1960 | 1960 | 369 | 0 | — |
| Heavyweight | 14 | Floyd Patterson | 29 Jun 1960 | 1960 | 25 Sep 1962 | 1962 | 818 | 2 | 2 |
| Heavyweight | 15 | Sonny Liston | 25 Sep 1962 | 1962 | 25 Feb 1964 | 1964 | 518 | 1 | — |
| Heavyweight | 16 | Muhammad Ali | 25 Feb 1964 | 1964 | 13 Mar 1970 | 1970 | 2,208 | 9 | — |
| Heavyweight | 17 | Joe Frazier | May 1970 | 1970 | 22 Jan 1973 | 1973 | — | 4 | awarded title |
| Heavyweight | 18 | George Foreman | 22 Jan 1973 | 1973 | 30 Oct 1974 | 1974 | 646 | 2 | — |
| Heavyweight | 19 | Muhammad Ali | 30 Oct 1974 | 1974 | 15 Feb 1978 | 1978 | 1,204 | 10 | 2 |
| Heavyweight | 20 | Leon Spinks | 15 Feb | 1978 | 15 Sep 1978 | 1978 | 212 | 0 | — |
| Heavyweight | 21 | Muhammad Ali | 15 Sep 1978 | 1978 | 3 Jul 1979 | 1979 | 291 | 0 | 3 |
| Heavyweight | 22 | Larry Holmes | 31 Mar 1980 | 1980 | 21 Sep 1985 | 1985 | 2,000 | 14 | awarded The Ring title upon Mike Weaver 's def. of John Tate for the WBA title, as Holmes had previously successfully defended his WBC title against Weaver [ 10 ] |
| Heavyweight | 23 | Michael Spinks | 21 Sep 1985 | 1985 | 27 Jun 1988 | 1988 | 1,010 | 3 | — |
| Heavyweight | 24 | Mike Tyson | 27 Jun 1988 | 1988 | 31 Dec 1989 | 1989 | 552 | 2 | — |
| Heavyweight | 25 | Lennox Lewis | 2 Dec 2001 | 2001 | 6 Feb 2004 | 2004 | 796 | 2 | awarded title |
| Heavyweight | 26 | Vitali Klitschko | 24 Apr 2004 | 2004 | 9 Nov 2005 | 2005 | 564 | 1 | def. Corrie Sanders |
| Heavyweight | 27 | Wladimir Klitschko | 20 Jun 2009 | 2009 | 28 Nov 2015 | 2015 | 2,352 | 11 | def. Ruslan Chagaev |
| Heavyweight | 28 | Tyson Fury | 28 Nov 2015 | 2015 | 1 Feb 2018 | 2018 | 796 | 0 | — |
| Heavyweight | 29 | Tyson Fury | 22 Feb 2020 | 2020 | 13 Aug 2022 | 2022 | 903 | 2 | 2; def. Deontay Wilder |
| Heavyweight | 30 | Oleksandr Usyk | 20 Aug 2022 | 2022 | present | 2026 | 1,485 | 5 | def. Anthony Joshua |
| Cruiserweight | 1 | Carlos de León | 3 Feb 1984 | 1984 | 6 Jun 1985 | 1985 | 489 | 2 | awarded inaugural title |
| Cruiserweight | 2 | Alfonzo Ratliff | 6 Jun | 1985 | 21 Sep 1985 | 1985 | 107 | 0 | — |
| Cruiserweight | 3 | Bernard Benton | 21 Sep 1985 | 1985 | 22 Mar 1986 | 1986 | 182 | 0 | — |
| Cruiserweight | 4 | Carlos de León | 22 Mar 1986 | 1986 | 30 Mar 1987 | 1987 | 373 | 2 | 2 |
| Cruiserweight | 5 | Jean-Marc Mormeck | 2 Apr 2005 | 2005 | 7 Jan 2006 | 2006 | 280 | 0 | def. Wayne Braithwaite |
| Cruiserweight | 6 | O'Neil Bell | 7 Jan 2006 | 2006 | 17 Mar 2007 | 2007 | 434 | 0 | — |
| Cruiserweight | 7 | Jean-Marc Mormeck | 17 Mar | 2007 | 10 Nov 2007 | 2007 | 238 | 0 | 2 |
| Cruiserweight | 8 | David Haye | 10 Nov 2007 | 2007 | 30 Jun 2008 | 2008 | 233 | 1 | — |
| Cruiserweight | 9 | Tomasz Adamek | 11 Dec 2008 | 2008 | 10 Feb 2010 | 2010 | 426 | 2 | def. Steve Cunningham |
| Cruiserweight | 10 | Yoan Pablo Hernández | 4 Feb 2012 | 2012 | 23 Nov 2015 | 2015 | 1,388 | 3 | def. Steve Cunningham |
| Cruiserweight | 11 | Oleksandr Usyk | 21 Jul 2018 | 2018 | 16 Oct 2019 | 2019 | 452 | 1 | def. Murat Gassiev |
| Cruiserweight | 12 | Mairis Briedis | 26 Sep 2020 | 2020 | 2 Jul 2022 | 2022 | 644 | 1 | def. Yuniel Dorticos |
| Cruiserweight | 13 | Jai Opetaia | 2 Jul 2022 | 2022 | present | 2026 | 1,534 | 9 | — |
| Light heavyweight | 1 | Mike McTigue | 1924 | 1924 | 23 May 1925 | 1925 | — | 0 | awarded inaugural title |
| Light heavyweight | 2 | Paul Berlenbach | 23 May 1925 | 1925 | 16 Jul 1926 | 1926 | 419 | 3 | — |
| Light heavyweight | 3 | Jack Delaney | 16 Jul 1926 | 1926 | Jun 1927 | 1927 | — | 1 | — |
| Light heavyweight | 4 | Tommy Loughran | 7 Oct 1927 | 1927 | 18 Jul 1929 | 1929 | 650 | 5 | def. Mike McTigue |
| Light heavyweight | 5 | Maxie Rosenbloom | 25 Jun 1930 | 1930 | 16 Nov 1934 | 1934 | 1,605 | 7 | def. Jimmy Slattery |
| Light heavyweight | 6 | Bob Olin | 16 Nov 1934 | 1934 | 31 Oct 1935 | 1935 | 349 | 0 | — |
| Light heavyweight | 7 | John Henry Lewis | 31 Oct 1935 | 1935 | Jun 1939 | 1939 | — | 5 | — |
| Light heavyweight | 8 | Billy Conn | 13 Jul 1939 | 1939 | Jun 1941 | 1941 | — | 3 | def. Melio Bettina |
| Light heavyweight | 9 | Gus Lesnevich | 26 Aug 1941 | 1941 | 26 Jul 1948 | 1948 | 2,526 | 4 | def. Tami Mauriello |
| Light heavyweight | 10 | Freddie Mills | 26 Jul 1948 | 1948 | 24 Jan 1950 | 1950 | 547 | 0 | — |
| Light heavyweight | 11 | Joey Maxim | 24 Jan 1950 | 1950 | 17 Dec 1952 | 1952 | 1,058 | 2 | — |
| Light heavyweight | 12 | Archie Moore | 17 Dec 1952 | 1952 | 12 May 1962 | 1962 | 3,433 | 9 | — |
| Light heavyweight | 13 | Harold Johnson | 12 May 1962 | 1962 | 1 Jun 1963 | 1963 | 385 | 1 | def. Doug Jones |
| Light heavyweight | 14 | Willie Pastrano | 1 Jun 1963 | 1963 | 30 Mar 1965 | 1965 | 668 | 2 | — |
| Light heavyweight | 15 | José Torres | 30 Mar 1965 | 1965 | 16 Dec 1966 | 1966 | 626 | 3 | — |
| Light heavyweight | 16 | Dick Tiger | 16 Dec 1966 | 1966 | 24 May 1968 | 1968 | 525 | 2 | — |
| Light heavyweight | 17 | Bob Foster | 24 May 1968 | 1968 | 16 Sep 1974 | 1974 | 2,306 | 14 | — |
| Light heavyweight | 18 | Matthew Saad Muhammad | 30 Nov 1979 | 1979 | 19 Dec 1981 | 1981 | 750 | 7 | awarded title |
| Light heavyweight | 19 | Dwight Muhammad Qawi | 19 Dec 1981 | 1981 | 18 Mar 1983 | 1983 | 454 | 3 | — |
| Light heavyweight | 20 | Michael Spinks | 18 Mar 1983 | 1983 | 5 Nov 1985 | 1985 | 963 | 4 | — |
| Light heavyweight | 21 | Roy Jones Jr. | 2 Dec 2001 | 2001 | 15 May 2004 | 2004 | 895 | 3 | awarded title |
| Light heavyweight | 22 | Antonio Tarver | 15 May | 2004 | 18 Dec 2004 | 2004 | 217 | 0 | — |
| Light heavyweight | 23 | Glen Johnson | 18 Dec 2004 | 2004 | 18 Jun 2005 | 2005 | 182 | 0 | — |
| Light heavyweight | 24 | Antonio Tarver | 18 Jun 2005 | 2005 | 10 Jun 2006 | 2006 | 357 | 1 | 2 |
| Light heavyweight | 25 | Bernard Hopkins | 10 Jun 2006 | 2006 | 19 Apr 2008 | 2008 | 679 | 1 | — |
| Light heavyweight | 26 | Joe Calzaghe | 19 Apr 2008 | 2008 | 5 Feb 2009 | 2009 | 292 | 1 | — |
| Light heavyweight | 27 | Jean Pascal | 14 Aug 2010 | 2010 | 21 May 2011 | 2011 | 280 | 1 | def. Chad Dawson |
| Light heavyweight | 28 | Bernard Hopkins | 21 May 2011 | 2011 | 28 Apr 2012 | 2012 | 343 | 0 | 2 |
| Light heavyweight | 29 | Chad Dawson | 28 Apr 2012 | 2012 | 8 Jun 2013 | 2013 | 406 | 0 | — |
| Light heavyweight | 30 | Adonis Stevenson | 8 Jun 2013 | 2013 | 23 Nov 2015 | 2015 | 898 | 6 | — |
| Light heavyweight | 31 | Andre Ward | 17 Jun | 2017 | 21 Sep 2017 | 2017 | 96 | 0 | def. Sergey Kovalev |
| Light heavyweight | 32 | Artur Beterbiev | 12 Oct 2024 | 2024 | 22 Feb 2025 | 2025 | 133 | 0 | def. Dmitry Bivol |
| Light heavyweight | 33 | Dmitry Bivol | 22 Feb 2025 | 2025 | present | 2026 | 568 | 1 | — |
| Super middleweight | 1 | Joe Calzaghe | 4 Mar 2006 | 2006 | 26 Sep 2008 | 2008 | 937 | 3 | def. Jeff Lacy |
| Super middleweight | 2 | Andre Ward | 17 Dec 2011 | 2011 | 19 Feb 2015 | 2015 | 1,160 | 2 | def. Carl Froch |
| Super middleweight | 3 | Callum Smith | 28 Sep 2018 | 2018 | 19 Dec 2020 | 2020 | 813 | 2 | def. George Groves |
| Super middleweight | 4 | Canelo Álvarez | 19 Dec 2020 | 2020 | 13 Sep 2025 | 2025 | 1,729 | 9 | — |
| Super middleweight | 5 | Terence Crawford | 13 Sep 2025 | 2025 | 27 Jan 2026 | 2026 | 136 | 0 | — |
| Middleweight | 1 | Harry Greb | 1924 | 1924 | 26 Feb 1926 | 1926 | — | 3 | awarded inaugural title |
| Middleweight | 2 | Tiger Flowers | 26 Feb | 1926 | 3 Dec 1926 | 1926 | 280 | 1 | — |
| Middleweight | 3 | Mickey Walker | 3 Dec 1926 | 1926 | 19 Jun 1931 | 1931 | 1,659 | 3 | — |
| Middleweight | 4 | Marcel Thil | 11 Jun 1932 | 1932 | 23 Sep 1937 | 1937 | 1,930 | 10 | def. Gorilla Jones |
| Middleweight | 5 | Freddie Steele | 23 Sep 1937 | 1937 | 1938 | 1938 | — | 1 | awarded title |
| Middleweight | 6 | Tony Zale | 28 Nov 1941 | 1941 | 16 Jul 1947 | 1947 | 2,056 | 1 | def. Georgie Abrams |
| Middleweight | 7 | Rocky Graziano | 16 July 1947 | 1947 | 10 Jun 1948 | 1948 | 330 | 0 | — |
| Middleweight | 8 | Tony Zale | 10 Jun | 1948 | 21 Sep 1948 | 1948 | 103 | 0 | 2 |
| Middleweight | 9 | Marcel Cerdan | 21 Sep 1948 | 1948 | 17 Jun 1949 | 1949 | 269 | 0 | — |
| Middleweight | 10 | Jake LaMotta | 17 Jun 1949 | 1949 | 14 Feb 1951 | 1951 | 607 | 2 | — |
| Middleweight | 11 | Sugar Ray Robinson | 14 Feb | 1951 | 10 Jul 1951 | 1951 | 146 | 0 | — |
| Middleweight | 12 | Randy Turpin | 10 Jul | 1951 | 12 Sep 1951 | 1951 | 64 | 0 | — |
| Middleweight | 13 | Sugar Ray Robinson | 12 Sep 1951 | 1951 | 18 Dec 1952 | 1952 | 463 | 2 | 2 |
| Middleweight | 14 | Carl Olson | 21 Oct 1953 | 1953 | 9 Dec 1955 | 1955 | 779 | 3 | def. Randy Turpin |
| Middleweight | 15 | Sugar Ray Robinson | 9 Dec 1955 | 1955 | 2 Jan 1957 | 1957 | 390 | 1 | 3 |
| Middleweight | 16 | Gene Fullmer | 2 Jan | 1957 | 1 May 1957 | 1957 | 119 | 0 | — |
| Middleweight | 17 | Sugar Ray Robinson | 1 May | 1957 | 23 Sep 1957 | 1957 | 145 | 0 | 4 |
| Middleweight | 18 | Carmen Basilio | 23 Sep 1957 | 1957 | 25 Mar 1958 | 1958 | 183 | 0 | — |
| Middleweight | 19 | Sugar Ray Robinson | 25 Mar 1958 | 1958 | 22 Jan 1960 | 1960 | 668 | 0 | 5 |
| Middleweight | 20 | Paul Pender | 22 Jan 1960 | 1960 | 11 Jul 1961 | 1961 | 536 | 3 | — |
| Middleweight | 21 | Terry Downes | 11 Jul 1961 | 1961 | 7 Apr 1962 | 1962 | 270 | 0 | — |
| Middleweight | 22 | Paul Pender | 7 Apr 1962 | 1962 | 7 May 1963 | 1963 | 395 | 0 | 2 |
| Middleweight | 23 | Dick Tiger | 7 May | 1963 | 7 Dec 1963 | 1963 | 214 | 1 | awarded title |
| Middleweight | 24 | Joey Giardello | 7 Dec 1963 | 1963 | 21 Oct 1965 | 1965 | 684 | 1 | — |
| Middleweight | 25 | Dick Tiger | 21 Oct 1965 | 1965 | 25 Apr 1966 | 1966 | 186 | 0 | 2 |
| Middleweight | 26 | Emile Griffith | 25 Apr 1966 | 1966 | 17 Apr 1967 | 1967 | 357 | 2 | — |
| Middleweight | 27 | Nino Benvenuti | 17 Apr | 1967 | 20 Sep 1967 | 1967 | 156 | 0 | — |
| Middleweight | 28 | Emile Griffith | 29 Sep 1967 | 1967 | 4 Mar 1968 | 1968 | 157 | 0 | 2 |
| Middleweight | 29 | Nino Benvenuti | 4 Mar 1968 | 1968 | 7 Nov 1970 | 1970 | 978 | 4 | 2 |
| Middleweight | 30 | Carlos Monzón | 7 Nov 1970 | 1970 | 29 Aug 1977 | 1977 | 2,487 | 14 | — |
| Middleweight | 31 | Rodrigo Valdez | 5 Nov 1977 | 1977 | 22 Apr 1978 | 1978 | 168 | 0 | def. Bennie Briscoe |
| Middleweight | 32 | Hugo Corro | 22 Apr 1978 | 1978 | 30 Jun 1979 | 1979 | 434 | 2 | — |
| Middleweight | 33 | Vito Antuofermo | 30 Jun 1979 | 1979 | 16 Mar 1980 | 1980 | 260 | 1 | — |
| Middleweight | 34 | Alan Minter | 16 Mar | 1980 | 27 Sep 1980 | 1980 | 195 | 1 | — |
| Middleweight | 35 | Marvin Hagler | 27 Sep 1980 | 1980 | 6 Apr 1987 | 1987 | 2,382 | 12 | — |
| Middleweight | 36 | Sugar Ray Leonard | 6 April | 1987 | 27 May 1987 | 1987 | 51 | 0 | — |
| Middleweight | 37 | Sumbu Kalambay | 6 Jul 1988 | 1988 | 25 Mar 1989 | 1989 | 262 | 2 | awarded title |
| Middleweight | 38 | Michael Nunn | 25 Mar 1989 | 1989 | 31 Dec 1989 | 1989 | 281 | 1 | — |
| Middleweight | 39 | Bernard Hopkins | 2 Dec 2001 | 2001 | 16 Jul 2005 | 2005 | 1,322 | 6 | awarded title |
| Middleweight | 40 | Jermain Taylor | 16 Jul 2005 | 2005 | 29 Sep 2007 | 2007 | 805 | 4 | — |
| Middleweight | 41 | Kelly Pavlik | 29 Sep 2007 | 2007 | 17 Apr 2010 | 2010 | 931 | 3 | — |
| Middleweight | 42 | Sergio Martínez | 17 Apr 2010 | 2010 | 7 Jun 2014 | 2014 | 1,512 | 6 | — |
| Middleweight | 43 | Miguel Cotto | 7 Jun 2014 | 2014 | 21 Nov 2015 | 2015 | 532 | 1 | — |
| Middleweight | 44 | Canelo Álvarez | 21 Nov 2015 | 2015 | 12 Jun 2018 | 2018 | 934 | 2 | — |
| Middleweight | 45 | Canelo Álvarez | 15 Sep 2018 | 2018 | 2 Jan 2021 | 2021 | 840 | 1 | 2; def. Gennady Golovkin |
| Junior middleweight | 1 | Oscar Albarado | 4 Jun 1974 | 1974 | 21 Jan 1975 | 1975 | 231 | 1 | def. Koichi Wajima |
| Junior middleweight | 2 | Koichi Wajima | 21 Jan | 1975 | 7 Jun 1975 | 1975 | 137 | 0 | — |
| Junior middleweight | 3 | Yuh Jae-Doo | 7 June 1975 | 1975 | 17 Feb 1976 | 1976 | 255 | 1 | — |
| Junior middleweight | 4 | Koichi Wajima | 17 Feb | 1976 | 18 May 1976 | 1976 | 91 | 0 | 2 |
| Junior middleweight | 5 | José Durán | 18 May | 1976 | 8 Oct 1976 | 1976 | 143 | 0 | — |
| Junior middleweight | 6 | Miguel Angel Castellini | 8 Oct 1976 | 1976 | 5 Mar 1977 | 1977 | 148 | 0 | — |
| Junior middleweight | 7 | Eddie Gazo | 5 Mar 1977 | 1977 | 9 Aug 1978 | 1978 | 522 | 3 | — |
| Junior middleweight | 8 | Masashi Kudo | 9 Aug 1978 | 1978 | 24 Oct 1979 | 1979 | 441 | 3 | — |
| Junior middleweight | 9 | Ayub Kalule | 24 Oct 1979 | 1979 | 25 Jun 1981 | 1981 | 610 | 4 | — |
| Junior middleweight | 10 | Sugar Ray Leonard | 25 Jun 1981 | 1981 | 1982 | 1982 | — | 0 | — |
| Junior middleweight | 11 | Thomas Hearns | 3 Dec 1982 | 1982 | 24 Oct 1986 | 1986 | 1,421 | 4 | def. Wilfred Benítez |
| Junior middleweight | 12 | Oscar De La Hoya | 14 Sep 2002 | 2002 | 13 Sep 2003 | 2003 | 364 | 1 | def. Fernando Vargas |
| Junior middleweight | 13 | Shane Mosley | 13 Sep 2003 | 2003 | 13 Mar 2004 | 2004 | 182 | 0 | — |
| Junior middleweight | 14 | Winky Wright | 13 Mar 2004 | 2004 | 2 Nov 2005 | 2005 | 599 | 1 | — |
| Junior middleweight | 15 | Canelo Álvarez | 20 Apr | 2013 | 14 Sep 2013 | 2013 | 147 | 0 | def. Austin Trout |
| Junior middleweight | 16 | Floyd Mayweather Jr. | 14 Sep 2013 | 2013 | 10 Aug 2015 | 2015 | 695 | 0 | — |
| Junior middleweight | 17 | Jermell Charlo | 26 Sep 2020 | 2020 | 13 Jul 2024 | 2024 | 1,386 | 2 | def. Jeison Rosario |
| Welterweight | 1 | Mickey Walker | 1924 | 1924 | 20 May 1926 | 1926 | — | 2 | awarded inaugural title |
| Welterweight | 2 | Pete Latzo | 20 May 1926 | 1926 | 3 Jun 1927 | 1927 | 379 | 2 | — |
| Welterweight | 3 | Joe Dundee | 3 Jun 1927 | 1927 | 25 Jul 1929 | 1929 | 783 | 0 | — |
| Welterweight | 4 | Jackie Fields | 25 Jul 1929 | 1929 | 9 May 1930 | 1930 | 288 | 0 | — |
| Welterweight | 5 | Jack Thompson | 9 May | 1930 | 5 Sep 1930 | 1930 | 119 | 0 | — |
| Welterweight | 6 | Tommy Freeman | 5 Sep 1930 | 1930 | 14 Apr 1931 | 1931 | 221 | 0 | — |
| Welterweight | 7 | Jack Thompson | 14 Apr | 1931 | 23 Oct 1931 | 1931 | 192 | 0 | 2 |
| Welterweight | 8 | Lou Brouillard | 23 Oct 1931 | 1931 | 28 Jan 1932 | 1932 | 97 | 0 | — |
| Welterweight | 9 | Jackie Fields | 28 Jan 1932 | 1932 | 22 Feb 1933 | 1933 | 391 | 0 | 2 |
| Welterweight | 10 | Young Corbett III | 22 February | 1933 | 29 May 1933 | 1933 | 96 | 0 | — |
| Welterweight | 11 | Jimmy McLarnin | 29 May 1933 | 1933 | 28 May 1934 | 1934 | 364 | 0 | — |
| Welterweight | 12 | Barney Ross | 28 May | 1934 | 17 Sep 1934 | 1934 | 112 | 0 | — |
| Welterweight | 13 | Jimmy McLarnin | 17 Sep 1934 | 1934 | 28 May 1935 | 1935 | 253 | 0 | 2 |
| Welterweight | 14 | Barney Ross | 28 May 1935 | 1935 | 31 May 1938 | 1938 | 1,099 | 2 | 2 |
| Welterweight | 15 | Henry Armstrong | 31 May 1938 | 1938 | 4 Oct 1940 | 1940 | 857 | 19 | — |
| Welterweight | 16 | Fritzie Zivic | 4 Oct 1940 | 1940 | 29 Jul 1941 | 1941 | 298 | 1 | — |
| Welterweight | 17 | Freddie Cochrane | 29 Jul 1941 | 1941 | 1 Feb 1946 | 1946 | 1,648 | 0 | — |
| Welterweight | 18 | Marty Servo | 1 Feb | 1946 | 25 Sep 1946 | 1946 | 236 | 0 | — |
| Welterweight | 19 | Sugar Ray Robinson | 20 Dec 1946 | 1946 | 15 Feb 1951 | 1951 | 1,518 | 5 | def. Tommy Bell |
| Welterweight | 20 | Kid Gavilán | 29 Aug 1951 | 1951 | 20 Oct 1954 | 1954 | 1,148 | 7 | def. Billy Graham |
| Welterweight | 21 | Johnny Saxton | 20 Oct 1954 | 1954 | 1 Apr 1955 | 1955 | 163 | 0 | — |
| Welterweight | 22 | Tony DeMarco | 1 Apr | 1955 | 10 Jun 1955 | 1955 | 70 | 0 | — |
| Welterweight | 23 | Carmen Basilio | 10 Jun 1955 | 1955 | 14 Mar 1956 | 1956 | 278 | 1 | — |
| Welterweight | 24 | Johnny Saxton | 14 Mar | 1956 | 12 Sep 1956 | 1956 | 182 | 0 | 2 |
| Welterweight | 25 | Carmen Basilio | 12 Sep 1956 | 1956 | 23 Sep 1957 | 1957 | 376 | 1 | 2 |
| Welterweight | 26 | Virgil Akins | 6 June | 1958 | 5 Dec 1958 | 1958 | 182 | 0 | def. Vince Martinez |
| Welterweight | 27 | Don Jordan | 5 Dec 1958 | 1958 | 27 May 1960 | 1960 | 539 | 2 | — |
| Welterweight | 28 | Benny Paret | 27 May 1960 | 1960 | 1 Apr 1961 | 1961 | 309 | 1 | — |
| Welterweight | 29 | Emile Griffith | 1 Apr | 1961 | 30 Sep 1961 | 1961 | 182 | 1 | — |
| Welterweight | 30 | Benny Paret | 30 Sep 1961 | 1961 | 24 Mar 1962 | 1962 | 175 | 0 | 2 |
| Welterweight | 31 | Emile Griffith | 24 Mar 1962 | 1962 | 21 Mar 1963 | 1963 | 362 | 2 | 2 |
| Welterweight | 32 | Luis Manuel Rodríguez | 21 Mar | 1963 | 8 Jun 1963 | 1963 | 79 | 0 | — |
| Welterweight | 33 | Emile Griffith | 8 Jun 1963 | 1963 | 1966 | 1966 | — | 5 | 3 |
| Welterweight | 34 | Curtis Cokes | 28 Nov 1966 | 1966 | 18 Apr 1969 | 1969 | 872 | 4 | def. Jean Josselin |
| Welterweight | 35 | José Nápoles | 18 Apr 1969 | 1969 | 3 Dec 1970 | 1970 | 594 | 3 | — |
| Welterweight | 36 | Billy Backus | 3 Dec 1970 | 1970 | 4 Jun 1971 | 1971 | 183 | 0 | — |
| Welterweight | 37 | José Nápoles | 4 Jun 1971 | 1971 | 6 Dec 1975 | 1975 | 1,646 | 10 | 2 |
| Welterweight | 38 | John Stracey | 6 Dec 1975 | 1975 | 22 Jun 1976 | 1976 | 199 | 1 | — |
| Welterweight | 39 | Carlos Palomino | 22 Jun 1976 | 1976 | 14 Jan 1979 | 1979 | 936 | 7 | — |
| Welterweight | 40 | Wilfred Benítez | 14 Jan | 1979 | 30 Nov 1979 | 1979 | 320 | 1 | — |
| Welterweight | 41 | Sugar Ray Leonard | 30 Nov 1979 | 1979 | 20 Jun 1980 | 1980 | 203 | 1 | — |
| Welterweight | 42 | Roberto Durán | 20 Jun | 1980 | 25 Nov 1980 | 1980 | 158 | 0 | — |
| Welterweight | 43 | Sugar Ray Leonard | 25 Nov 1980 | 1980 | 9 Nov 1982 | 1982 | 714 | 2 | 2 |
| Welterweight | 44 | Donald Curry | 6 Dec 1985 | 1985 | 27 Sep 1986 | 1986 | 295 | 1 | def. Milton McCrory |
| Welterweight | 45 | Lloyd Honeyghan | 27 Sep 1986 | 1986 | 27 Oct 1987 | 1987 | 395 | 3 | — |
| Welterweight | 46 | Jorge Vaca | 27 Oct 1987 | 1987 | 29 Mar 1988 | 1988 | 154 | 0 | — |
| Welterweight | 47 | Lloyd Honeyghan | 29 Mar 1988 | 1988 | 4 Feb 1989 | 1989 | 312 | 1 | 2 |
| Welterweight | 48 | Marlon Starling | 4 Feb | 1989 | 31 Dec 1989 | 1989 | 330 | 1 | — |
| Welterweight | 49 | Vernon Forrest | 26 Jan 2002 | 2002 | 25 Jan 2003 | 2003 | 364 | 1 | def. Shane Mosley |
| Welterweight | 50 | Ricardo Mayorga | 25 Jan | 2003 | 13 Dec 2003 | 2003 | 322 | 1 | — |
| Welterweight | 51 | Cory Spinks | 13 Dec 2003 | 2003 | 5 Feb 2005 | 2005 | 420 | 2 | — |
| Welterweight | 52 | Zab Judah | 5 Feb 2005 | 2005 | 7 Jan 2006 | 2006 | 336 | 1 | — |
| Welterweight | 53 | Carlos Baldomir | 7 Jan | 2006 | 4 Nov 2006 | 2006 | 301 | 1 | — |
| Welterweight | 54 | Floyd Mayweather Jr. | 4 Nov 2006 | 2006 | 6 Jun 2008 | 2008 | 580 | 1 | — |
| Welterweight | 55 | Floyd Mayweather Jr. | 4 May 2013 | 2013 | 12 Sep 2015 | 2015 | 861 | 4 | 2; def. Robert Guerrero |
| Welterweight | 56 | Terence Crawford | 29 Jul 2023 | 2023 | 3 Aug 2024 | 2024 | 371 | 0 | def. Errol Spence Jr. |
| Welterweight | 57 | Jaron Ennis | 12 Apr | 2025 | 7 Aug 2025 | 2025 | 117 | 0 | def. Eimantas Stanionis |
| Junior welterweight | 1 | Mushy Callahan | 1928 | 1928 | 18 Feb 1930 | 1930 | — | 1 | awarded inaugural title |
| Junior welterweight | 2 | Jack Berg | 18 Feb 1930 | 1930 | 1931 | 1931 | — | 6 | — |
| Junior welterweight | 3 | Duilio Loi | 15 Dec 1962 | 1962 | 24 Jan 1963 | 1963 | 40 | 0 | def. Eddie Perkins |
| Junior welterweight | 4 | Eddie Perkins | 15 Jun 1963 | 1963 | 18 Jan 1965 | 1965 | 583 | 2 | def. Roberto Cruz |
| Junior welterweight | 5 | Carlos Hernández | 18 Jan 1965 | 1965 | 29 Apr 1966 | 1966 | 466 | 2 | — |
| Junior welterweight | 6 | Sandro Lopopolo | 29 Apr 1966 | 1966 | 30 Apr 1967 | 1967 | 366 | 1 | — |
| Junior welterweight | 7 | Takeshi Fuji | 30 Apr 1967 | 1967 | 12 Dec 1968 | 1968 | 592 | 1 | — |
| Junior welterweight | 8 | Nicolino Locche | 12 Dec 1968 | 1968 | 10 Mar 1972 | 1972 | 1,184 | 5 | — |
| Junior welterweight | 9 | Alfonso Frazer | 10 Mar | 1972 | 28 Oct 1972 | 1972 | 232 | 0 | — |
| Junior welterweight | 10 | Antonio Cervantes | 28 Oct 1972 | 1972 | 6 Mar 1976 | 1976 | 1,225 | 10 | — |
| Junior welterweight | 11 | Wilfred Benítez | 6 Mar 1976 | 1976 | 1979 | 1979 | — | 3 | — |
| Junior welterweight | 12 | Antonio Cervantes | 18 Jan 1979 | 1979 | 2 Aug 1980 | 1980 | 562 | 2 | 2; def. Miguel Montilla |
| Junior welterweight | 13 | Aaron Pryor | 2 Aug 1980 | 1980 | 26 Oct 1983 | 1983 | 1,180 | 8 | — |
| Junior welterweight | 14 | Kostya Tszyu | 2 Dec 2001 | 2001 | 4 Jun 2005 | 2005 | 1,280 | 3 | awarded title |
| Junior welterweight | 15 | Ricky Hatton | 4 Jun 2005 | 2005 | 3 May 2009 | 2009 | 1,429 | 5 | — |
| Junior welterweight | 16 | Manny Pacquiao | 3 May 2009 | 2009 | 26 Jul 2010 | 2010 | 449 | 0 | — |
| Junior welterweight | 17 | Danny Garcia | 14 Jul 2012 | 2012 | 10 Aug 2015 | 2015 | 1,122 | 4 | def. Amir Khan |
| Junior welterweight | 18 | Terence Crawford | 23 Jul 2016 | 2016 | 18 Feb 2018 | 2018 | 575 | 3 | def. Viktor Postol |
| Junior welterweight | 19 | Josh Taylor | 26 Oct 2019 | 2019 | 10 Jun 2023 | 2023 | 1,323 | 3 | def. Regis Prograis |
| Junior welterweight | 20 | Teofimo Lopez | 10 Jun 2023 | 2023 | 31 Jan 2026 | 2026 | 966 | 3 | — |
| Junior welterweight | 21 | Shakur Stevenson | 31 Jan 2026 | 2026 | present | 2026 | 225 | 0 | — |
| Lightweight | 1 | Benny Leonard | 1924 | 1924 | 15 Jan 1925 | 1925 | — | 0 | awarded inaugural title |
| Lightweight | 2 | Jimmy Goodrich | 13 Jul | 1925 | 7 Dec 1925 | 1925 | 147 | 0 | def. Stanislaus Loayza |
| Lightweight | 3 | Rocky Kansas | 7 Dec 1925 | 1925 | 3 Jul 1926 | 1926 | 208 | 0 | — |
| Lightweight | 4 | Sammy Mandell | 3 Jul 1926 | 1926 | 17 Jul 1930 | 1930 | 1,475 | 2 | — |
| Lightweight | 5 | Al Singer | 17 Jul | 1930 | 14 Nov 1930 | 1930 | 120 | 0 | — |
| Lightweight | 6 | Tony Canzoneri | 14 Nov 1930 | 1930 | 23 Jun 1933 | 1933 | 952 | 4 | — |
| Lightweight | 7 | Barney Ross | 23 Jun 1933 | 1933 | 15 Apr 1935 | 1935 | 661 | 1 | — |
| Lightweight | 8 | Tony Canzoneri | 10 May 1935 | 1935 | 3 Sep 1936 | 1936 | 482 | 1 | 2; def. Lou Ambers |
| Lightweight | 9 | Lou Ambers | 3 Sep 1936 | 1936 | 17 Aug 1938 | 1938 | 713 | 2 | — |
| Lightweight | 10 | Henry Armstrong | 17 Aug 1938 | 1938 | 22 Aug 1939 | 1939 | 370 | 1 | — |
| Lightweight | 11 | Lou Ambers | 22 Aug 1939 | 1939 | 10 May 1940 | 1940 | 262 | 0 | 2 |
| Lightweight | 12 | Lew Jenkins | 10 May 1940 | 1940 | 19 Dec 1941 | 1941 | 588 | 1 | — |
| Lightweight | 13 | Sammy Angott | 19 Dec 1941 | 1941 | 13 Nov 1942 | 1942 | 329 | 1 | — |
| Lightweight | 14 | Ike Williams | 4 Aug 1947 | 1947 | 25 May 1951 | 1951 | 1,390 | 5 | def. Bob Montgomery |
| Lightweight | 15 | Jimmy Carter | 25 May 1951 | 1951 | 14 May 1952 | 1952 | 355 | 2 | — |
| Lightweight | 16 | Lauro Salas | 14 May | 1952 | 15 Oct 1952 | 1952 | 154 | 0 | — |
| Lightweight | 17 | Jimmy Carter | 15 Oct 1952 | 1952 | 5 Mar 1954 | 1954 | 506 | 3 | 2 |
| Lightweight | 18 | Paddy DeMarco | 5 Mar | 1954 | 17 Nov 1954 | 1954 | 257 | 0 | — |
| Lightweight | 19 | Jimmy Carter | 17 Nov 1954 | 1954 | 29 Jun 1955 | 1955 | 224 | 0 | 3 |
| Lightweight | 20 | Wallace Smith | 29 Jun 1955 | 1955 | 24 Aug 1956 | 1956 | 422 | 1 | — |
| Lightweight | 21 | Joe Brown | 24 Aug 1956 | 1956 | 21 Apr 1962 | 1962 | 2,066 | 11 | — |
| Lightweight | 22 | Carlos Ortiz | 21 Apr 1962 | 1962 | 10 Apr 1965 | 1965 | 1,085 | 4 | — |
| Lightweight | 23 | Ismael Laguna | 10 Apr | 1965 | 13 Nov 1965 | 1965 | 217 | 0 | — |
| Lightweight | 24 | Carlos Ortiz | 13 Nov 1965 | 1965 | 29 Jun 1968 | 1968 | 959 | 5 | 2 |
| Lightweight | 25 | Carlos Cruz | 29 Jun 1968 | 1968 | 18 Feb 1969 | 1969 | 234 | 1 | — |
| Lightweight | 26 | Mando Ramos | 18 Feb 1969 | 1969 | 3 Mar 1970 | 1970 | 378 | 1 | — |
| Lightweight | 27 | Ismael Laguna | 3 Mar | 1970 | 26 Sep 1970 | 1970 | 207 | 1 | 2 |
| Lightweight | 28 | Ken Buchanan | 26 Sep 1970 | 1970 | 26 Jun 1972 | 1972 | 639 | 2 | — |
| Lightweight | 29 | Roberto Durán | 26 Jun 1972 | 1972 | 1979 | 1979 | — | 12 | — |
| Lightweight | 30 | Jim Watt | 12 Apr | 1981 | 20 June 1981 | 1981 | 69 | 0 | awarded title |
| Lightweight | 31 | Alexis Argüello | 20 Jun 1981 | 1981 | Feb 1983 | 1983 | — | 4 | — |
| Lightweight | 32 | Julio César Chávez | 29 Oct 1988 | 1988 | 2 Mar 1989 | 1989 | 124 | 0 | def. José Luis Ramírez |
| Lightweight | 33 | Pernell Whitaker | 20 Aug | 1989 | 31 Dec 1989 | 1989 | 133 | 0 | def. José Luis Ramírez |
| Lightweight | 34 | Floyd Mayweather Jr. | 20 Apr 2002 | 2002 | 22 May 2004 | 2004 | 763 | 3 | def. José Luis Castillo |
| Lightweight | 35 | José Luis Castillo | 5 Jun 2004 | 2004 | 7 May 2005 | 2005 | 336 | 2 | def. Juan Lazcano |
| Lightweight | 36 | Diego Corrales | 7 May 2005 | 2005 | 6 Oct 2006 | 2006 | 517 | 0 | — |
| Lightweight | 37 | Joel Casamayor | 7 Oct 2006 | 2006 | 13 Sep 2008 | 2008 | 707 | 2 | def. Diego Corrales |
| Lightweight | 38 | Juan Manuel Márquez | 13 Sep 2008 | 2008 | 23 Apr 2012 | 2012 | 1,318 | 3 | — |
| Lightweight | 39 | Terence Crawford | 29 Nov 2014 | 2014 | 22 Apr 2015 | 2015 | 144 | 0 | def. Ray Beltrán |
| Lightweight | 40 | Jorge Linares | 24 Sep 2016 | 2016 | 13 May 2018 | 2018 | 596 | 3 | def. Anthony Crolla |
| Lightweight | 41 | Vasiliy Lomachenko | 13 May 2018 | 2018 | 17 Oct 2020 | 2020 | 888 | 3 | — |
| Lightweight | 42 | Teófimo López | 17 Oct 2020 | 2020 | 27 Nov 2021 | 2021 | 406 | 0 | — |
| Lightweight | 43 | George Kambosos Jr. | 27 Nov 2021 | 2021 | 5 June 2022 | 2022 | 190 | 0 | — |
| Lightweight | 44 | Devin Haney | 5 Jun 2022 | 2022 | 29 Nov 2023 | 2023 | 542 | 2 | — |
| Junior lightweight | 1 | Steve Sullivan | 20 Jun 1924 | 1924 | 1 Apr 1925 | 1925 | 285 | 2 | def. Johnny Dundee |
| Junior lightweight | 2 | Mike Ballerino | 1 Apr | 1925 | 2 Dec 1925 | 1925 | 245 | 1 | — |
| Junior lightweight | 3 | Tod Morgan | 2 Dec 1925 | 1925 | 20 Dec 1929 | 1929 | 1,479 | 12 | — |
| Junior lightweight | 4 | Benny Bass | 20 Dec 1929 | 1929 | 15 Jul 1931 | 1931 | 572 | 0 | — |
| Junior lightweight | 5 | Kid Chocolate | 15 July 1931 | 1931 | 1931 | 1931 | — | 1 | — |
| Junior lightweight | 6 | Flash Elorde | 1962 | 1962 | 14 Jun 1967 | 1967 | — | 6 | awarded title |
| Junior lightweight | 7 | Yoshiaki Numata | 15 Jun | 1967 | 14 Dec 1967 | 1967 | 182 | 0 | — |
| Junior lightweight | 8 | Hiroshi Kobayashi | 14 Dec 1967 | 1967 | 29 Jul 1971 | 1971 | 1,323 | 6 | — |
| Junior lightweight | 9 | Alfredo Marcano | 29 Jul 1971 | 1971 | 25 Apr 1972 | 1972 | 271 | 1 | — |
| Junior lightweight | 10 | Ben Villaflor | 25 Apr 1972 | 1972 | 13 Mar 1973 | 1973 | 322 | 1 | — |
| Junior lightweight | 11 | Kuniaki Shibata | 13 Mar | 1973 | 17 Oct 1973 | 1973 | 218 | 1 | — |
| Junior lightweight | 12 | Ben Villaflor | 17 Oct 1973 | 1973 | 16 Oct 1976 | 1976 | 1,095 | 5 | 2 |
| Junior lightweight | 13 | Samuel Serrano | 16 Oct 1976 | 1976 | 2 Aug 1980 | 1980 | 1,386 | 10 | — |
| Junior lightweight | 14 | Yasutsune Uehara | 2 Aug 1980 | 1980 | 9 Apr 1981 | 1981 | 250 | 1 | — |
| Junior lightweight | 15 | Samuel Serrano | 9 Apr 1981 | 1981 | 19 Jan 1983 | 1983 | 650 | 3 | 2 |
| Junior lightweight | 16 | Roger Mayweather | 19 Jan 1983 | 1983 | 26 Feb 1984 | 1984 | 403 | 2 | — |
| Junior lightweight | 17 | Rocky Lockridge | 26 Feb 1984 | 1984 | 19 May 1985 | 1985 | 448 | 2 | — |
| Junior lightweight | 18 | Wilfredo Gómez | 19 May 1985 | 1985 | 24 May 1986 | 1986 | 370 | 0 | — |
| Junior lightweight | 19 | Alfredo Layne | 24 May | 1986 | 27 Sep 1986 | 1986 | 126 | 0 | — |
| Junior lightweight | 20 | Brian Mitchell | 27 Sep 1986 | 1986 | 30 Mar 1987 | 1987 | 184 | 1 | — |
| Junior lightweight | 21 | Manny Pacquiao | 15 Mar | 2008 | 28 Jul 2008 | 2008 | 135 | 0 | def. Juan Manuel Márquez |
| Junior lightweight | 22 | Shakur Stevenson | 30 Apr | 2022 | 22 Sep 2022 | 2022 | 145 | 0 | def. Óscar Valdez |
| Featherweight | 1 | Louis Kid Kaplan | 2 Jan 1925 | 1925 | 6 Jul 1926 | 1926 | 550 | 3 | def. Danny Kramer |
| Featherweight | 2 | Tony Canzoneri | 24 Oct 1927 | 1927 | 28 Sep 1928 | 1928 | 340 | 1 | def. Johnny Dundee |
| Featherweight | 3 | André Routis | 28 Sep 1928 | 1928 | 23 Sep 1929 | 1929 | 360 | 1 | — |
| Featherweight | 4 | Christopher Battalino | 23 Sep 1929 | 1929 | 1 Mar 1932 | 1932 | 890 | 5 | — |
| Featherweight | 5 | Kid Chocolate | 13 Oct 1932 | 1932 | 17 Feb 1934 | 1934 | 492 | 2 | def. Lew Feldman |
| Featherweight | 6 | Freddie Miller | 20 Sept 1934 | 1934 | 11 May 1936 | 1936 | 599 | 5 | def. Nel Tarleton |
| Featherweight | 7 | Petey Sarron | 11 May 1936 | 1936 | 29 Oct 1937 | 1937 | 536 | 2 | — |
| Featherweight | 8 | Henry Armstrong | 29 Oct 1937 | 1937 | 12 Sep 1938 | 1938 | 318 | 0 | — |
| Featherweight | 9 | Joey Archibald | 18 Apr 1939 | 1939 | 20 May 1940 | 1940 | 398 | 1 | def. Leo Rodak |
| Featherweight | 10 | Harry Jeffra | 20 May 1940 | 1940 | 12 May 1941 | 1941 | 357 | 1 | — |
| Featherweight | 11 | Joey Archibald | 12 May | 1941 | 11 Sep 1941 | 1941 | 122 | 0 | 2 |
| Featherweight | 12 | Chalky Wright | 11 Sep 1941 | 1941 | 20 Nov 1942 | 1942 | 435 | 2 | — |
| Featherweight | 13 | Willie Pep | 20 Nov 1942 | 1942 | 29 Oct 1948 | 1948 | 2,170 | 6 | — |
| Featherweight | 14 | Sandy Saddler | 29 Oct 1948 | 1948 | 11 Feb 1949 | 1949 | 105 | 0 | — |
| Featherweight | 15 | Willie Pep | 11 Feb 1949 | 1949 | 8 Sep 1950 | 1950 | 574 | 3 | 2 |
| Featherweight | 16 | Sandy Saddler | 8 Sep 1950 | 1950 | 21 Jan 1957 | 1957 | 2,327 | 3 | 2 |
| Featherweight | 17 | Hogan Bassey | 24 Jun 1957 | 1957 | 18 Mar 1959 | 1959 | 632 | 1 | def. Cherif Hamia |
| Featherweight | 18 | Davey Moore | 18 Mar 1959 | 1959 | 21 Mar 1963 | 1963 | 1,464 | 5 | — |
| Featherweight | 19 | Sugar Ramos | 21 Mar 1963 | 1963 | 26 Sep 1964 | 1964 | 555 | 3 | — |
| Featherweight | 20 | Vicente Saldívar | 26 Sep 1964 | 1964 | 14 Oct 1967 | 1967 | 1,113 | 7 | — |
| Featherweight | 21 | Johnny Famechon | 21 Jan 1969 | 1969 | 9 May 1970 | 1970 | 473 | 2 | def. José Legrá |
| Featherweight | 22 | Vicente Saldívar | 9 May | 1970 | 11 Dec 1970 | 1970 | 216 | 0 | 2 |
| Featherweight | 23 | Kuniaki Shibata | 11 Dec 1970 | 1970 | 19 May 1972 | 1972 | 525 | 2 | — |
| Featherweight | 24 | Clemente Sánchez | 19 May | 1972 | 16 Dec 1972 | 1972 | 211 | 0 | — |
| Featherweight | 25 | Alexis Argüello | 31 May 1975 | 1975 | 20 Jun 1977 | 1977 | 751 | 2 | def. Rigoberto Riasco |
| Featherweight | 26 | Danny Lopez | 10 Mar 1979 | 1979 | 2 Feb 1980 | 1980 | 329 | 2 | def. Roberto Castañón |
| Featherweight | 27 | Salvador Sánchez | 2 Feb 1980 | 1980 | 12 Aug 1982 | 1982 | 922 | 9 | — |
| Featherweight | 28 | Eusebio Pedroza | 22 Sep 1982 | 1982 | 8 Jun 1985 | 1985 | 990 | 5 | awarded title |
| Featherweight | 29 | Barry McGuigan | 8 Jun 1985 | 1985 | 23 Jun 1986 | 1986 | 380 | 2 | — |
| Featherweight | 30 | Steve Cruz | 23 Jun 1986 | 1986 | 6 Mar 1987 | 1987 | 256 | 0 | — |
| Featherweight | 31 | Antonio Esparragoza | 6 Mar 1987 | 1987 | 31 Dec 1989 | 1989 | 1,031 | 6 | — |
| Featherweight | 32 | Marco Antonio Barrera | 22 Jun 2002 | 2002 | 15 Nov 2003 | 2003 | 511 | 2 | def. Érik Morales |
| Featherweight | 33 | Manny Pacquiao | 15 Nov 2003 | 2003 | 18 Jun 2005 | 2005 | 581 | 2 | — |
| Featherweight | 34 | Mikey Garcia | 19 Jan | 2013 | 24 Nov 2013 | 2013 | 309 | 0 | def. Orlando Salido |
| Junior featherweight | 1 | Wilfredo Gómez | 9 Mar 1979 | 1979 | May 1983 | 1983 | — | 10 | def. Nestor Jimenez |
| Junior featherweight | 2 | Paulie Ayala | 23 Feb 2002 | 2002 | May 2004 | 2004 | — | 0 | def. Bones Adams |
| Junior featherweight | 3 | Israel Vázquez | 3 Dec 2005 | 2005 | 3 Mar 2007 | 2007 | 455 | 2 | def. Óscar Larios |
| Junior featherweight | 4 | Rafael Márquez | 3 Mar | 2007 | 4 Aug 2007 | 2007 | 154 | 0 | — |
| Junior featherweight | 5 | Israel Vázquez | 4 Aug 2007 | 2007 | 31 May 2009 | 2009 | 666 | 1 | 2 |
| Junior featherweight | 6 | Nonito Donaire | 13 Oct 2012 | 2012 | 13 Apr 2013 | 2013 | 182 | 1 | def. Toshiaki Nishioka |
| Junior featherweight | 7 | Guillermo Rigondeaux | 13 Apr 2013 | 2013 | 9 Feb 2016 | 2016 | 1,032 | 4 | — |
| Junior featherweight | 8 | Naoya Inoue | 26 Dec 2023 | 2023 | present | 2026 | 992 | 7 | def. Marlon Tapales |
| Bantamweight | 1 | Eddie Martin | 19 Dec 1924 | 1924 | 20 Mar 1925 | 1925 | 91 | 0 | def. Abe Goldstein |
| Bantamweight | 2 | Charlie Phil Rosenberg | 20 Mar 1925 | 1925 | 4 Feb 1927 | 1927 | 686 | 1 | — |
| Bantamweight | 3 | Panama Al Brown | 25 Aug 1931 | 1931 | 1 Jun 1935 | 1935 | 1,376 | 7 | def. Pete Sanstol |
| Bantamweight | 4 | Baltasar Sangchili | 1 Jun 1935 | 1935 | 29 Jun 1936 | 1936 | 394 | 0 | — |
| Bantamweight | 5 | Tony Marino | 29 Jun | 1936 | 31 Aug 1936 | 1936 | 63 | 0 | — |
| Bantamweight | 6 | Sixto Escobar | 31 Aug 1936 | 1936 | 23 Sep 1937 | 1937 | 388 | 2 | — |
| Bantamweight | 7 | Harry Jeffra | 23 Sep 1937 | 1937 | 20 Feb 1938 | 1938 | 150 | 0 | — |
| Bantamweight | 8 | Sixto Escobar | 20 Feb 1938 | 1938 | 26 Oct 1939 | 1939 | 613 | 0 | 2 |
| Bantamweight | 9 | Lou Salica | 13 Jan 1941 | 1941 | 7 Aug 1942 | 1942 | 571 | 5 | def. Tommy Forte |
| Bantamweight | 10 | Manuel Ortiz | 7 Aug 1942 | 1942 | 6 Jan 1947 | 1947 | 1,613 | 15 | — |
| Bantamweight | 11 | Harold Dade | 6 Jan | 1947 | 11 Mar 1947 | 1947 | 64 | 0 | — |
| Bantamweight | 12 | Manuel Ortiz | 11 Mar 1947 | 1947 | 31 May 1950 | 1950 | 1,177 | 4 | 2 |
| Bantamweight | 13 | Vic Toweel | 31 May 1950 | 1950 | 15 Nov 1952 | 1952 | 899 | 3 | — |
| Bantamweight | 14 | Jimmy Carruthers | 15 Nov 1952 | 1952 | 16 May 1954 | 1954 | 547 | 3 | — |
| Bantamweight | 15 | Robert Cohen | 19 Sep 1954 | 1954 | 29 Jun 1956 | 1956 | 649 | 1 | def. Chamroen Songkitrat |
| Bantamweight | 16 | Mario D'Agata | 29 Jun 1956 | 1956 | 1 Apr 1957 | 1957 | 276 | 0 | — |
| Bantamweight | 17 | Alphonse Halimi | 1 Apr 1957 | 1957 | 8 Jul 1959 | 1959 | 828 | 1 | — |
| Bantamweight | 18 | José Becerra | 8 Jul 1959 | 1959 | 30 Aug 1960 | 1960 | 419 | 2 | — |
| Bantamweight | 19 | Éder Jofre | 25 Mar 1961 | 1961 | 17 May 1965 | 1965 | 1,514 | 7 | def. Piero Rollo |
| Bantamweight | 20 | Fighting Harada | 17 May 1965 | 1965 | 26 Feb 1968 | 1968 | 1,015 | 4 | — |
| Bantamweight | 21 | Lionel Rose | 26 Feb 1968 | 1968 | 22 Aug 1969 | 1969 | 543 | 3 | — |
| Bantamweight | 22 | Rubén Olivares | 22 Aug 1969 | 1969 | 16 Oct 1970 | 1970 | 420 | 2 | — |
| Bantamweight | 23 | Chucho Castillo | 16 Oct 1970 | 1970 | 2 Apr 1971 | 1971 | 168 | 0 | — |
| Bantamweight | 24 | Rubén Olivares | 2 Apr 1971 | 1971 | 19 Mar 1972 | 1972 | 352 | 2 | 2 |
| Bantamweight | 25 | Rafael Herrera | 19 Mar | 1972 | 30 Jul 1972 | 1972 | 133 | 0 | — |
| Bantamweight | 26 | Enrique Pinder | 30 Jul 1972 | 1972 | 20 Jan 1973 | 1973 | 174 | 0 | — |
| Bantamweight | 27 | Romeo Anaya | 20 Jan | 1973 | 3 Nov 1973 | 1973 | 287 | 2 | — |
| Bantamweight | 28 | Arnold Taylor | 3 Nov 1973 | 1973 | 3 Jul 1974 | 1974 | 242 | 0 | — |
| Bantamweight | 29 | Hong Soo-Hwan | 3 Jul 1974 | 1974 | 14 Mar 1975 | 1975 | 254 | 1 | — |
| Bantamweight | 30 | Alfonso Zamora | 14 Mar 1975 | 1975 | 19 Nov 1977 | 1977 | 981 | 5 | — |
| Bantamweight | 31 | Jorge Luján | 19 Nov 1977 | 1977 | 29 Aug 1980 | 1980 | 1,014 | 5 | — |
| Bantamweight | 32 | Julian Solís | 29 Aug | 1980 | 14 Nov 1980 | 1980 | 77 | 0 | — |
| Bantamweight | 33 | Jeff Chandler | 14 Nov 1980 | 1980 | 7 Apr 1984 | 1984 | 1,240 | 9 | — |
| Bantamweight | 34 | Richie Sandoval | 7 Apr 1984 | 1984 | 10 Mar 1986 | 1986 | 702 | 2 | — |
| Bantamweight | 35 | Gaby Canizales | 10 Mar | 1986 | 4 Jun 1986 | 1986 | 86 | 0 | — |
| Bantamweight | 36 | Bernardo Piñango | 4 Jun 1986 | 1986 | 13 Mar 1987 | 1987 | 282 | 3 | — |
| Bantamweight | 37 | Shinsuke Yamanaka | 16 Sep 2016 | 2016 | 15 Aug 2017 | 2017 | 333 | 1 | def. Anselmo Moreno |
| Bantamweight | 38 | Luis Nery | 15 Aug | 2017 | 26 Sep 2017 | 2017 | 42 | 0 | — |
| Bantamweight | 39 | Shinsuke Yamanaka | 26 Sep 2017 | 2017 | 1 Mar 2018 | 2018 | 156 | 0 | 2; reinstated |
| Bantamweight | 40 | Naoya Inoue | 18 May 2019 | 2019 | 13 Jan 2023 | 2023 | 1,336 | 6 | def. Emmanuel Rodríguez |
| Bantamweight | 41 | Junto Nakatani | 8 Jun | 2025 | 25 Sep 2025 | 2025 | 109 | 0 | def. Ryosuke Nishida |
| Junior bantamweight | 1 | Srisaket Sor Rungvisai | 24 Feb 2018 | 2018 | 26 Apr 2019 | 2019 | 426 | 1 | def. Juan Francisco Estrada |
| Junior bantamweight | 2 | Juan Francisco Estrada | 26 Apr 2019 | 2019 | 29 Jun 2024 | 2024 | 1,891 | 5 | — |
| Junior bantamweight | 3 | Jesse Rodriguez | 29 Jun 2024 | 2024 | 15 Jun 2026 | 2026 | 716 | 3 | — |
| Flyweight | 1 | Pancho Villa | 18 Jun 1923 | 1923 | 14 Jul 1925 | 1925 | 757 | 3 | def. Jimmy Wilde |
| Flyweight | 2 | Fidel LaBarba | 21 Jan | 1927 | 29 Aug 1927 | 1927 | 220 | 0 | def. Elky Clark |
| Flyweight | 3 | Benny Lynch | 19 Jan 1937 | 1937 | 29 Jun 1938 | 1938 | 526 | 1 | def. Small Montana |
| Flyweight | 4 | Peter Kane | 22 Sep 1938 | 1938 | 1939 | 1939 | — | 0 | def. Jackie Jurich |
| Flyweight | 5 | Jackie Paterson | 19 June 1943 | 1943 | 23 Mar 1948 | 1948 | 1,739 | 1 | def. Peter Kane |
| Flyweight | 6 | Rinty Monaghan | 23 March 1948 | 1948 | 25 April 1950 | 1950 | 763 | 3 | — |
| Flyweight | 7 | Terry Allen | 25 Apr | 1950 | 1 Aug 1950 | 1950 | 98 | 0 | def. Honore Pratesi |
| Flyweight | 8 | Dado Marino | 1 Aug 1950 | 1950 | 19 May 1952 | 1952 | 657 | 1 | — |
| Flyweight | 9 | Yoshio Shirai | 19 May 1952 | 1952 | 26 Nov 1954 | 1954 | 921 | 4 | — |
| Flyweight | 10 | Pascual Perez | 26 Nov 1954 | 1954 | 16 Apr 1960 | 1960 | 1,968 | 9 | — |
| Flyweight | 11 | Pone Kingpetch | 16 Apr 1960 | 1960 | 10 Oct 1962 | 1962 | 907 | 3 | — |
| Flyweight | 12 | Fighting Harada | 10 Oct 1962 | 1962 | 12 Jan 1963 | 1963 | 94 | 0 | — |
| Flyweight | 13 | Pone Kingpetch | 12 Jan | 1963 | 18 Sep 1963 | 1963 | 249 | 0 | 2 |
| Flyweight | 14 | Hiroyuki Ebihara | 18 Sep 1963 | 1963 | 23 Jan 1964 | 1964 | 127 | 0 | — |
| Flyweight | 15 | Pone Kingpetch | 23 Jan 1964 | 1964 | 23 Apr 1965 | 1965 | 456 | 0 | 3 |
| Flyweight | 16 | Salvatore Burruni | 23 Apr 1965 | 1965 | 14 Jun 1966 | 1966 | 417 | 1 | — |
| Flyweight | 17 | Walter McGowan | 14 Jun | 1966 | 30 Dec 1966 | 1966 | 199 | 0 | — |
| Flyweight | 18 | Chartchai Chionoi | 30 Dec 1966 | 1966 | 23 Feb 1969 | 1969 | 786 | 4 | — |
| Flyweight | 19 | Efren Torres | 23 Feb 1969 | 1969 | 20 Mar 1970 | 1970 | 390 | 1 | — |
| Flyweight | 20 | Chartchai Chionoi | 20 Mar | 1970 | 7 Dec 1970 | 1970 | 262 | 0 | 2 |
| Flyweight | 21 | Erbito Salavarria | 7 Dec 1970 | 1970 | 9 Feb 1973 | 1973 | 795 | 3 | — |
| Flyweight | 22 | Venice Borkhorsor | 9 Feb | 1973 | 10 Jul 1973 | 1973 | 151 | 0 | — |
| Flyweight | 23 | Miguel Canto | 8 Jan 1975 | 1975 | 18 Mar 1979 | 1979 | 1,530 | 14 | def. Shoji Oguma |
| Flyweight | 24 | Park Chan-Hee | 18 Mar 1979 | 1979 | 18 May 1980 | 1980 | 427 | 5 | — |
| Flyweight | 25 | Shoji Oguma | 18 May 1980 | 1980 | 12 May 1981 | 1981 | 359 | 3 | — |
| Flyweight | 26 | Antonio Avelar | 12 May 1981 | 1981 | 20 Mar 1982 | 1982 | 312 | 1 | — |
| Flyweight | 27 | Prudencio Cardona | 20 Mar | 1982 | 24 Jul 1982 | 1982 | 126 | 0 | — |
| Flyweight | 28 | Freddy Castillo | 24 Jul | 1982 | 6 Nov 1982 | 1982 | 105 | 0 | — |
| Flyweight | 29 | Eleoncio Mercedes | 6 Nov 1982 | 1982 | 15 Mar 1983 | 1983 | 129 | 0 | — |
| Flyweight | 30 | Charlie Magri | 15 Mar | 1983 | 27 Sep 1983 | 1983 | 196 | 0 | — |
| Flyweight | 31 | Frank Cedeno | 27 Sep 1983 | 1983 | 18 Jan 1984 | 1984 | 113 | 0 | — |
| Flyweight | 32 | Kōji Kobayashi | 18 Jan | 1984 | 9 Apr 1984 | 1984 | 82 | 0 | — |
| Flyweight | 33 | Gabriel Bernal | 9 Apr | 1984 | 8 October 1984 | 1984 | 182 | 1 | — |
| Flyweight | 34 | Sot Chitalada | 8 Oct 1984 | 1984 | 24 Jul 1988 | 1988 | 1,385 | 6 | — |
| Flyweight | 35 | Kim Yong-Kang | 24 Jul 1988 | 1988 | 31 Dec 1989 | 1989 | 525 | 1 | — |
| Flyweight | 36 | Pongsaklek Wonjongkam | 27 Mar 2010 | 2010 | 2 Mar 2012 | 2012 | 706 | 4 | def. Kōki Kameda |
| Flyweight | 37 | Sonny Boy Jaro | 2 Mar | 2012 | 16 Jul 2012 | 2012 | 136 | 0 | — |
| Flyweight | 38 | Toshiyuki Igarashi | 16 Jul 2012 | 2012 | 8 Apr 2013 | 2013 | 266 | 1 | — |
| Flyweight | 39 | Akira Yaegashi | 8 Apr 2013 | 2013 | 5 Sep 2014 | 2014 | 515 | 3 | — |
| Flyweight | 40 | Román González | 5 Sep 2014 | 2014 | 1 Oct 2016 | 2016 | 757 | 4 | — |
| Junior flyweight | 1 | Rosendo Álvarez | 31 Mar 2003 | 2003 | 2 Oct 2004 | 2004 | 551 | 1 | def. Beibis Mendoza |
| Junior flyweight | 2 | Hugo Cázares | 30 Sep 2006 | 2006 | 25 Aug 2007 | 2007 | 329 | 1 | def. Nelson Dieppa |
| Junior flyweight | 3 | Iván Calderón | 25 Aug 2007 | 2007 | 28 Aug 2010 | 2010 | 1,099 | 6 | — |
| Junior flyweight | 4 | Giovani Segura | 28 Aug 2010 | 2010 | 12 Sep 2011 | 2011 | 380 | 1 | — |
| Junior flyweight | 5 | Donnie Nietes | 10 May 2014 | 2014 | 3 Aug 2016 | 2016 | 816 | 5 | def. Moisés Fuentes |
| Junior flyweight | 6 | Ryoichi Taguchi | 31 Dec 2017 | 2017 | 20 May 2018 | 2018 | 140 | 1 | def. Milan Melindo |
| Junior flyweight | 7 | Hekkie Budler | 20 May | 2018 | 31 Dec 2018 | 2018 | 225 | 0 | — |
| Junior flyweight | 8 | Hiroto Kyoguchi | 31 Dec 2018 | 2018 | 1 Nov 2022 | 2022 | 1,401 | 4 | — |
| Junior flyweight | 9 | Kenshiro Teraji | 1 Nov 2022 | 2022 | 14 Oct 2024 | 2024 | 713 | 3 | — |
| Strawweight | 1 | Oscar Collazo | 16 Nov 2024 | 2024 | present | 2026 | 666 | 3 | def. Knockout CP Freshmart |
— marks a reign whose printed dates do not include a day, so its length is not computed.
Download the full table (CSV) · 423 rows
How the Numbers Were Made
The table reproduces the 17 per-division tables on the Wikipedia article List of The Ring world champions, retrieved 13 September 2026, dropping only full-width note rows that carry no reign. Those tables are footnoted to The Ring's own championship announcements and ratings. BoxRec was not used, so this is a table of reigns with defense counts, not a fight-by-fight record with results, methods or rounds.
Reign length in days is our calculation: the printed end date (or 13 September 2026 for a current champion) minus the printed start date. Where the source gives a start as day and month only, the year is the reign's end year, as the source's date ranges imply. 22 completed reigns print a month or year without a day and are shown with a dash. Champion names and notes are as printed; interim or disputed reigns keep the source's own numbering.
The Ring recognized only the heavyweight division in 1922 and added the others over the following decades; it also named no champions between 1989 and 2001. Each division's rows begin when The Ring began naming a champion there, and the 1990 era split lands on that gap. Median reign length per division counts only completed reigns with both dates parsed; divisions with fewer than ten such reigns are listed in the table but not ranked.
Sources
- List of The Ring world championssecondaryWikipedia · secondary · retrieved 2026-09-13 · CC BY-SA 4.0 — Division tables used as printed; footnoted to The Ring
- The Ring Ratings and Championship PolicyprimaryThe Ring · primary · All rights reserved — The article's underlying source for Ring championship recognition; not fetched for this page