Sines (Portuguese pronunciation: [ˈsin(ɨ)ʃ] (listen)) is a Portuguese city of Setúbal District, the Alentejo region and subregion of the Alentejo coast, with about 18,298 inhabitants (2015 INE). It is the largest and the first port area of Portugal and the main city industrial port logistics in Portugal and the birthplace of fifteenth-century explorer Vasco da Gama.
It is the seat of a municipality with 203.30 km ² of area and 18,598 inhabitants (2015 INE), divided into two parishes. The municipality is bordered to the north and east by the municipality of Santiago do Cacém, south and west by Odemira has coastline on the Atlantic Ocean. The coastline of the city, south of São Torpes, is one part of the natural parks of Southwest Alentejo and Vicentine Coast Natural Park.