Calatrava, officially the Municipality of Calatrava, is a municipality in the province of Romblon, Philippines. According to the 2020 census, it has a population of 11,342 people. Calatrava, once a barrio in the town of San Agustin in Tablas Island. During pre-Spanish period, the place was called "Andagao", named after a medicinal plant growing in abundance everywhere in the locality especially in places along the shore.