Flyweight
| Name: | Date: | Location: | Defenses: |
|---|---|---|---|
| Elvis Álvarez def. Miguel Mercedes |
March 3, 1989 | Medellín, Colombia | 0 |
| Title vacated | March 1990 | Alvarez vacated the title due to lack of interest in it. | |
| Isidro Perez def. Angel Rosario |
August 18, 1990 | Ponce, Puerto Rico | 2 |
| Pat Clinton | March 18, 1992 | Glasgow, Scotland, United Kingdom | 1 |
| Jacob Matlala | May 15, 1993 | Glasgow, Scotland, United Kingdom | 3 |
| Alberto Jiménez | February 11, 1995 | Hammanskraal, South Africa | 5 |
| Carlos Gabriel Salazar | December 13, 1996 | Buenos Aires, Argentina | 5 |
| Ruben Sánchez León | August 14, 1998 | Mexicali, Mexico | 1 |
| José López | April 23, 1999 | Zaragoza, Spain | 1 |
| Title vacated | 1999 | ||
| Isidro García def. José López |
December 18, 1999 | Indio, California, United States | 1 |
| Fernando Montiel | December 15, 2000 | Ciudad Obregón, Mexico | 3 |
| Title vacated | 2001–2002 | ||
| Adonis Rivas def. Jair Jimenez |
May 4, 2002 | Managua, Nicaragua | 0 |
| Omar Andrés Narváez | July 13, 2002 | Buenos Aires, Argentina | 16 |
| Title vacated | 2010 | ||
| Julio Cesar Miranda | June 12, 2010 | Mexico | 0 |
Read more about this topic: List Of WBO World Champions