Puerto Barrios is a city in Guatemala, located at on the Gulf of Honduras at 15.73°N, 88.60°W, in Guatemala's department of Izabal, of which Puerto Barrios is the departmental seat. Puerto Barrios was named after President Justo Rufino Barrios. It is the main Caribbean Sea port of Guatemala, together with its more modern twin port town just to the east, Santo Tomas de Castilla. In 2003 the estimated population of Puerto Barrios was 40,900 people.