Bermeo is a town and municipality in the comarca of Busturialdea. It is in the province of Biscay, which is part of the autonomous region of the Basque Country in northern Spain. With a population of 16,765, it is the most important fishing port in the Basque Country. The town was founded in 1236, and is the largest in Busturialdea. Bermeo was the provincial capital of Biscay from 1476 to 1602.