Alfonso Martínez may refer to:
- Alfonso Martínez Domínguez (1922–2002), Mexican politician
- Alfonso Martínez de Toledo (c. 1398–c. 1470), Castilian poet and writer
- Alfonso Martinez (actor) (born 1988), Filipino actor
- Alfonso Martínez (football manager)
- Alfonso Martínez (taekwondo), Belizean taekwondo martial artist
- Alfonso Martínez (basketball)