| Isidro Pérez | |
| Realname: | Isidro Pérez |
| Nickname: | Sid |
| Weight: | Featherweight Bantamweight Flyweight Light flyweight |
| Height: | 5 ft 9 in (177 cm) |
| Reach: | 72 in (183 cm) |
| Nationality: |  Mexican |
| Birth Date: | 24 May 1964 |
| Birth Place: | Guerrero, Mexico |
| Style: | Orthodox |
| Total: | 69 |
| Wins: | 57 |
| Ko: | 41 |
| Losses: | 9 |
| Draws: | 3 |
| No Contests: | 0 |
Isidro Pérez (May 24, 1964 – January 9, 2013) was a Mexican professional boxer in the Lightweight division. Pérez is a former two-time WBO Flyweight Champion.[1]
In May 1986, Isidro won the Mexican National Light Flyweight Championship by beating veteran Jorge Cano.
In his first World Championship attempt he lost a very disputed twelve-round decision to Jung-Koo Chang in Chungmu Gymnasium, Daejeon, South Korea.
On August 18, 1990 Pérez won the WBO Flyweight Championship by upsetting Puerto Rico's Angel Rosario with a twelfth round T.K.O. in Ponce, Puerto Rico.
Isidro Pérez was reported to have died in Mexico in January 2013,[2] he was reported missing earlier. Perez's friends and family have not heard from him in months previous to reporting him missing and he has not cashed a pension check since September 2012. Date of death was not reported.