Agostinho is a Portuguese language noun meaning Augustine. It may be used as a given name or a surname.
It may refer to:
- Agostinho (footballer) (b. 1975), Portuguese football (soccer) player, full name Joaquim Agostinho da Silva Ribeiro
- Agostinho da Silva (1906-1994), Portuguese philosopher, essayist and writer
- Agostinho Neto (1922-1979), first President of Angola
- Joaquim Agostinho (1943-1984), Portuguese professional bicycle racer
- José Agostinho de Macedo (1761-1831), Portuguese poet and prose writer
- José Maria de Santo Agostinho (died 1912), Brazilian mystic