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Busturialde - Urdaibai
Busturialdea map modern.gif
Country Spain
Autonomous communityBasque Country
CapitalsBermeo and Gernika
 • Total220 km2 (80 sq mi)
 • Total46.000
Time zoneUTC+1 (CET)
 • Summer (DST)UTC+2 (CEST)
Largest municipalityBermeo (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, which should not be confused with Busturia, which is 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.


Historical Busturialdea (red) in the context of formation of Biscay (orange)

Busturia used to be one of the merindades of Biscay and included a larger territory than the current one of Busturialdea, as it reached the province of Gipuzkoa.

Busturialdea was historically the core of Biscay: the capitals of the province, Bermeo and Gernika, were located in it; the village of Mundaka, also belonging to this region, had the privilege of speaking always first in the sessions of its parliament and for some time, the harbour of Bermeo was the main portuary facility, until Bilbao was founded in 1300.

Busturialdea and its lush estuary was also important in prehistory. Particularly significative is its site of Santimamiñe cave, that yielded a full sequence of human habitation from Neanderthals to the Iron Age, and beautiful Magdalenian cave paintings.

Bermeo and Gernika-Lumo, the two important villages of Busturialdea region[edit]




Busturialdea is located at the north of the province of Biscay, limiting with the comarcas of Lea-Artibai on the east, Uribe and Greater Bilbao on the west and Durangaldea on the south; the Bay of Biscay limits at north.

The comarca is located along the Urdaibai estuary, which has been named Biosphere Reserve by UNESCO in 1984[1][2]


San Juan de Gaztelugatxe, Bermeo
San Antonio beach, Sukarrieta
Municipality Population Territory km²
Escudo de Ajangiz.png Ajangiz 457 7,35
Escudo de Arratzu.svg Arratzu 388 10,34
Escudo de Bermeo.svg Bermeo 17.144 34,12
Escudo de Busturia.svg Busturia 4.8 19,63
Escudo de Kortezubi.svg Kortezubi 423 11,91
Escudo de Ea.svg Ea 886 14,17
Escudo de Elantxobe.svg Elantxobe 402 1,85
Escudo de Ereño.svg Ereño 278 10,67
Escudo de Errigoiti.svg Errigoiti 537 16,42
Escudo de Forua.svg Forua 969 7,94
Escudo de Gautegiz Arteaga.svg Gautegiz Arteaga 910 13,57
Escudo de Gernika Lumo.svg Gernika-Lumo 16.812 8,47
Escudo de Ibarrangelu.svg Ibarrangelu 641 15,56
Escudo de Mendata.svg Mendata 378 22,39
Escudo de Morga.svg Morga 406 17,6
Escudo de Muxika.svg Muxika 1.468 50,02
Escudo de Mundaka.svg Mundaka 1.940 4,15
Escudo de Murueta.svg Murueta 302 5,45
Escudo de Nabarniz.svg Nabarniz 227 11,75
Escudo de Sukarrieta.svg Sukarrieta 357 2,3

Photo gallery[edit]


  1. ^ Bizkaia maitea. Urdaibai Archived 2009-03-10 at the Wayback Machine Bizkaiko Foru Aldundia - Diputación Foral de Bizkaia
  2. ^ Actividades en la Reserva de la Biosfera de Urdaibai Archived 2007-02-18 at the Wayback Machine UNESO Center of the Basque Country.

Coordinates: 43°20′52″N 2°41′33″W / 43.34778°N 2.69250°W / 43.34778; -2.69250