Castelao may refer to:
People Alfonso Daniel Rodríguez Castelao, Galician politician, writer, painter and doctor Ofelia Rey Castelao (b. 1956), Galician historian, writer, and university professor
Association football stadiums nicknamed Castelão Castelão (Maranhão) (Estádio Governador João Castelo), located in São Luís, Maranhão, Brazil Castelão (Ceará) (Estádio Plácido Aderaldo Castelo), located in Fortaleza, Ceará, Brazil
Other Castelão (grape), a Portuguese wine grape grown in the Bairrada DOC and other regions.