Oiartzualdea in Basque (Oarsoaldea in Spanish) is a subcomarca of Donostialdea in Gipuzkoa, formed by four municipalities, Errenteria being the main town.
Oiartzualdea in Basque (Oarsoaldea in Spanish) is a subcomarca of Donostialdea in Gipuzkoa, formed by four municipalities, Errenteria being the main town.