Bantamweight

1890–92	George Dixon¹
1894–99	Jimmy Barry²
1899–
1900	Terry McGovern¹
1901	Harry Harris¹
1902–03	Harry Forbes
1903–04	Frankie Neil
1904	Joe Bowker¹
1905–07	Jimmy Walsh¹
1910–14	Johnny Coulon
1914–17	Kid Williams
1917–20	Pete Herman
1920	Joe Lynch
1920–21	Joe Lynch, Pete Herman, Johnny Buff
1922	Johnny Buff, Joe Lynch
1923	Joe Lynch
1924	Joe Lynch, Abe Goldstein, Eddie “Cannonball” Martin
1925	Eddie “Cannonball” Martin, Charlie (Phil) Rosenberg³
1927–28	Bud Taylor (NBA)¹
1929–34	Al Brown
1935	Al Brown, Baltazar Sangchili
1936	Baltazar Sangchili, Tony Marino, Sixto Escobar
1937	Sixto Escobar, Harry Jeffra
1938	Harry Jeffra, Sixto Escobar
1939–40	Sixto Escobar²
1940–42	Lou Salica
1942–46	Manuel Ortiz
1947	Manuel Ortiz, Harold Dade
1948–50	Manuel Ortiz
1950–52	Vic Toweel
1952–54	Jimmy Carruthers²
1954–55	Robert Cohen
1956	Robert Cohen, Mario D'Agata, Raul Macias (NBA)
1957	Mario D'Agata, Alphonse Halimi
1958–59	Alphonse Halimi
1959–60	Jose Becerra²
1960–61	Alphonse Halimi⁴
1961–62	Johnny Caldwell⁴
1961–65	Eder Jofre
1965–68	Masahika “Fighting” Harada
1968	Masahika “Fighting” Harada, Lionel Rose
1969	Lionel Rose, Ruben Olivares
1970	Ruben Olivares, Chucho Castillo
1971	Chucho Castillo, Ruben Olivares
1972	Ruben Olivares, Rafael Herrera, Enrique Pinder
1973	Enrique Pinder (WBA), Romeo Anaya (WBA), Arnold Taylor (WBA), Rodolfo Martinez (WBC), Rafael Herrera
1974	Arnold Taylor (WBA), Soo Hwan Hong (WBA), Rafael Herrera (WBC), Rodolfo Martinez (WBC)
1975	Soo Hwan Hong (WBA), Alfonso Zamora (WBA), Rodolfo Martinez (WBC)
1976	Alfonso Zamora (WBA), Rodolfo Martinez (WBC), Carlos Zarate (WBC)
1977	Alfonso Zamora (WBA), Jorge Lujan (WBA), Carlos Zarate (WBC)
1978	Jorge Lujan (WBA), Carlos Zarate (WBC)
1979	Jorge Lujan (WBA), Carlos Zarate (WBC), Lupe Pintor (WBC)
1980	Jorge Lujan (WBA), Lupe Pintor (WBC), Julian Solis (WBA), Jeff Chandler (WBA)
1981	Lupe Pintor (WBC), Jeff Chandler (WBA)
1982	Lupe Pintor (WBC), Jeff Chandler (WBA)
1983	Jeff Chandler (WBA), Albert Dauila (WBC)
1984	Richie Sandqual (WBA), Albert Dauila (WBC)
1985	Richard Sandoval (WBA), Daniel Zaragoza (WBC), Miguel Lora (WBC)
1986	Richard Sandoval (WBA), Bernardo Pinango (WBA), Jeff Fenech (IBF)
1987	Bernardo Pinango (WBA), Takuya Muguruma (WBA), Miguel Lora (WBC)
1988	Wilfredo Vásquez (WBA), Jibaro Perez (WBC), Moon Sung-gil (WBA), Orlando Canizales (IBF)
1989	Jibaro Perez (WBC), Moon Sung-gil (WBA), Orlando Canizales (IBF), Kaokor Galaxy (WBA), Luis Espinosa (WBA)
1990	Orlando Canizales (IBF), Jibaro Perez (WBC), Luis Espinosa (WBA)
1991	Greg Richardson (WBC), Orlando Canizales (IBF), Luis Espinosa (WBA)
1992	Joichiro Tatsuyoshi (WBC), Victor Manuel Rabanales (WBC), Eddie Cook (WBA), Orlando Gonzales (IBF)
1993	Jorge Julio (WBA), Byun-Jong-il (WBC), Orlando Canizales (IBF)
1994	John Michael Johnson (WBA), Yasuei Yakushiji (WBC), Orlando Canizales (IBF)
1995	Daorun Chuwatang (WBA), Yasuei Yakushiji (WBC), Mbulelo Botile (IBF)
1996–97	Nana Konadu (WBA), Wayne McCullough (WBC), Mbulelo Botile (IBF)
1998	Nana Konadu (WBA), Joichiro Tatsuyoshi (WBC), Tim Austin (IBF)
1999– 2001	Paulie Ayala (WBA), Veeraphol Sahaprom (WBC), Tim Austin (IBF)
2002	Johnny Bredahl (WBA), Veeraphol Sahaprom (WBC), Tim Austin (IBF)
2003–04	Johnny Bredahl (WBA), Veerapol Sahaprom (WBC), Rafael Marquez (IBF)
2005	Wladimir Sidorenko (WBA), Hozumi Hasegawa (WBC), Rafael Marquez (IBF)