Busturialdea

Busturialde - Urdaibai
Eskualdea / Comarca
Country	Spain
Autonomous community	Basque Country
Province	Biscay
Capitals	Bermeo and Gernika
Municipalities	List Bermeo, Mundaka, Sukarrieta, Busturia, Murueta, Forua, Gernika, Errigoiti, Morga, Ajangiz, Mendata, Arratzu, Muxika, Nabarniz, Kortezubi, Gautegiz Arteaga, Ibarrangelu, Elantxobe, Ereño, Ea
Area
• Total	220 km2 (80 sq mi)
Population
• Total	46.000
Time zone	UTC+1 (CET)
• Summer (DST)	UTC+2 (CEST)
Largest municipality	Bermeo (17.144)

Busturialdea, also named Busturialde - Urdaibai is a comarca of the province of Biscay, in the Basque Country, Spain. It is the heir of "Busturia", one of the original merindades that used to compose the province of Biscay – this should not be confused with Busturia, a municipality located in this region. Busturialdea is a diminished portion of the same original subregion and has two capital cities; Bermeo and Gernika-Lumo. It is one of the seven comarcas that compose the province of Biscay.