Guillermo Diaz

Guillermo Diaz may refer to:


 * Guillermo Díaz (footballer, born 1926), Chilean footballer
 * Guillermo Díaz (footballer, born 1930) (1930–1997), Chilean footballer
 * Guillermo Díaz (wrestler) (born 1964), Mexican Olympic wrestler
 * Guillermo Díaz (actor) (born 1975), American actor
 * Guillermo Díaz (footballer, born 1979), Uruguayan footballer
 * Guillermo Diaz (basketball) (born 1985), Puerto Rican basketball player
 * Guillermo Díaz (footballer, born 1994), Chilean footballer
 * Memo Diaz, (born 1995), American soccer player