Alagoa may refer to:

People E. J. Alagoa. Nigerian historian

Places Brazil: Alagoas, a northeastern state Alagoa, Minas Gerais Alagoa Grande, Paraíba Alagoa Nova, Paraíba Conceição das Alagoas, Minas Gerais Estrela de Alagoas, Alagoas

Portugal: Alagoa, Portalegre