Busturialdea
| Busturialde - Urdaibai | |
|---|---|
| Country | Spain | 
| Autonomous community | Basque Country | 
| Province | Biscay | 
| Capitals | Bermeo and Guernica | 
| Municipalities | |
| 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.