| Mario Trejo | |
| Fullname: | Mario Alberto Trejo Guzmán |
| Birth Date: | 11 February 1956 |
| Birth Place: | Mexico City, Mexico |
| Position: | Defender |
| Years1: | 1975–1986 |
| Clubs1: | Club América |
| Caps1: | 233 |
| Goals1: | 21 |
| Years2: | 1986–1990 |
| Clubs2: | Tampico Madero |
| Caps2: | 91 |
| Goals2: | 11 |
| Totalcaps: | 324 |
| Totalgoals: | 32 |
| Nationalyears1: | 1980–1986 |
| Nationalteam1: | Mexico |
| Nationalcaps1: | 53 |
| Nationalgoals1: | 1 |
| Manageryears1: | 2007 |
| Manageryears2: | 2009 |
| Manageryears3: | 2011–2012 |
| Managerclubs3: | Unión de Curtidores |
| Manageryears4: | 2012–2014 |
| Manageryears5: | 2014–2015 |
| Managerclubs5: | Topos de Reynosa FC |
| Manageryears6: | 2017 |
| Managerclubs6: | Albinegros de Orizaba |
| Manageryears7: | 2017–2018 |
| Managerclubs7: | América Academy |
| Manageryears8: | 2018 |
| Managerclubs8: | América Premier |
| Manageryears9: | 2019–2020 |
| Managerclubs9: | América Academy |
Mario Alberto Trejo Guzmán (born 11 February 1956) is a Mexican former professional footballer. He played for Mexico in the 1986 FIFA World Cup.[1]