Guillermo Diaz
Guillermo Diaz may refer to:
- Guillermo Díaz-Plaja, Spanish literary critic, historian and poet.
- Guillermo Díaz (footballer, [born 1926)], Chilean footballer
- Guillermo Díaz (footballer, born 1930), Chilean footballer
- Guillermo Díaz Gea, Mexican politician
- Guillermo Díaz (wrestler), Mexican Olympic wrestler
- Guillermo Díaz (actor), American actor
- Guillermo Díaz (footballer, born 1979), Uruguayan footballer
- Guillermo Diaz (basketball), Puerto Rican basketball player
- Guillermo Díaz (footballer, born 1994), Chilean footballer
- Memo Diaz,, American soccer player