Arrigorriaga is a town and municipality located in the province of Bizkaia, in the autonomous community of Basque Country, northern Spain. Arrigorriaga is located 7 km south of Bilbao and is part of Bilbao's metropolitan area. Its official population at the 2010 census was 12,358 inhabitants living on a land area of 16.36 km² (6.3 sq mi).