Sumaarraga is a town and municipality in Spain, part of the province of Guipuzcoa in the autonomous community of the Basque Country (autonomous community). The municipality is part of the district (komarka) Goyerry. Covers an area of 19.42 km². Population - 10,037 people (for 2010). The distance to the administrative center of the province is 54 km. History The city was founded in 1661.