Debabarrena (English: Lower Deba) is a comarca located in Gipuzkoa, Basque Country (Spain). It has an area of 180,3 km². It is north from the comarca of Debagoiena, east from the province of Biscay, and south from the Gulf of Biscay. The municipalities which compose Debabarrena are Eibar, Placencia de las Armas, Elgoibar, Mendaro, Deba and Mutriku. Eibar is the biggest one with about 28,000 inhabitants.