Castelo may refer to:
Places Brazil Castelo, Espírito Santo, a municipality in the State of Espírito Santo Castelo (Rio de Janeiro), a neighbourhood in the city of Rio de Janeiro
Portugal Castelo (Lisbon), a civil parish in the municipality of Lisbon Castelo (Moimenta da Beira), a civil parish in the municipality of Moimenta da Beira Castelo (Sertã), a civil parish in the municipality of Sertã Castelo (Sesimbra), a civil parish in the municipality of Sesimbra Santa Maria do Castelo e São Miguel (Torres Vedras), a civil parish in the municipality of Torres Vedras Castelo do Neiva (Viana do Castelo), a civil parish in the municipality of Viana do Castelo
Other Castelo Futebol Clube, a Brazilian football (soccer) club