Aizarnazabal is a town in the province of Gipuzkoa, within the autonomous community of the Basque Country in northern Spain. It is one of the smaller municipalities in the region, situated in the coastal province that borders France to the northeast.
As of 2014, the town had a total population of 775 inhabitants. That figure reflects its character as a small, rural settlement rather than an urban centre.
Its location in Gipuzkoa places it within the broader Basque Country, an area of northern Spain known for its distinct language and culture. Beyond its administrative status as a municipality and its recorded population, few further details are established in the available sources.