Guillermo Martínez
Guillermo Martínez is the name of:
- Guillermo Martínez (baseball), American baseball coach
- Guillermo Martínez Ayala, Mexican football player
- Guillermo Martínez (javelin thrower), Cuban javelin thrower
- Guillermo Martínez (sport shooter), Colombian sport shooter
- Guillermo Martínez (volleyball), Argentine volleyball player
- Guillermo Martínez (writer), Argentine novelist and short story writer
- Guillermo Martínez Casañ, Spanish politician
- Guillermo Ortiz Martínez, Mexican economist and politician
- Guillermo Zúñiga Martínez, Mexican politician