Arrigorriaga is a town and municipality situated in the province of Bizkaia within the autonomous community of Basque Country, located in northern Spain. It covers a land area of 16.36 square kilometres.
The municipality is positioned approximately 7 kilometers south of Bilbao and functions as part of the city's metropolitan area. As of the 2019 census, Arrigorriaga had an official population of 12,160 inhabitants.