Añasco (Spanish pronunciation: [aˈɲasko]), named after one of its settlers, Don Luis de Añasco, is a municipality of Puerto Rico located on the west coast of the island bordering the Mona Passage to the west, north of Mayagüez, and Las Marias; south of Rincón, Aguada, and Moca and west of San Sebastián and Las Marias. It is part of the Aguadilla-Isabela-San Sebastián Metropolitan Statistical Area.