Busturialde - Urdaibai
Comarca
Kintra	Spain
Autonomous commonty	Basque Kintra
Province	Biscay
Caipitals	Bermeo an Guernica
Municipalities	Leet Bermeo, Mundaka, Sukarrieta, Busturia, Murueta, Fórua, Guernica, 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)
Lairgest municipality	Bermeo (17.144)

Busturialdea, namit Busturialde - Urdaibai an aw is a comarca o the province o Biscay, in the Basque Kintra, Spain. It is the heir o "Busturia", ane o the oreeginal merindades that uised tae compone the province o Biscay, which shoud no be ramfeeselt wi Busturia, which is a municipality locatit in this region. Busturialdea is a diminished portion o the same oreeginal subregion an haes twa caipital ceeties; Bermeo an Gernika-Lumo. It is ane o the seiven comarcas that compone the province o Biscay.

Busturia uised tae be ane o the merindades o Biscay an includit a lairger territory than the current ane o Busturialdea, as it reached the province o Gipuzkoa.

Busturialdea wis historically the core o Biscay: the caipitals o the province, Bermeo an Guernica, wur locatit in it; the veelage o Mundaka, belangin tae this region an aw, haed the privilege o speakin aye first in the sessions o its pairlament an for some time, the harbour o Bermeo wis the main portuar facility, tikl Bilbao wis foondit in 1300.

Busturialdea an its lush estuar wi important in prehistory an aw. Pairticularly significative is its steid o Santimamiñe cave, that yieldit a full sequence o human habitation frae Neanderthals tae the Airn Age, an bonnie Magdalenian cave pentins.

Busturialdea is locatit at the north o the province o Biscay, limitin wi the comarcas o Lea-Artibai on the east, Uribe an Greater Bilbao on the wast an Durangaldea on the sooth. The Bay o Biscay leemits at north.

The comarca is locatit alang the Urdaibai estuar, which haes been namit Biosphere Reserve bi UNESCO in 1984^[1][2]

	Municipality	Population	Territory km²
	Ajangiz	457	7,35
	Arratzu	388	10,34
	Bermeo	17.144	34,12
	Busturia	1.745	19,63
	Kortezubi	423	11,91
	Ea	886	14,17
	Elantxobe	402	1,85
	Ereño	278	10,67
	Errigoiti	537	16,42
	Forua	969	7,94
	Gautegiz Arteaga	910	13,57
	Gernika-Lumo	16.812	8,47
	Ibarrangelu	641	15,56
	Mendata	378	22,39
	Morga	406	17,6
	Muxika	1.468	50,02
	Mundaka	1.940	4,15
	Murueta	302	5,45
	Nabarniz	227	11,75
	Sukarrieta	357	2,3

• 
  San Pedro Atxarre
• 
  Sukarrieta
• 
  Mundaka
• 
  Elantxobe
• 
  Madariaga Touer, Busturia
• 
  Childer camp, Sukarrieta
• 
  Toña beach, Sukarrieta
• 
  Izaro isle
• 
  Laida beach, Ibarrangelu
• 
  The castle o Arteaga, Gautegiz Arteaga
• 
  Ogoño cape
• 
  San Juan de Gaztelugatxe an Akats isle, Bermeo
• 
  San Juan de Gaztelugatxe, Bermeo
• 
  Port o Bermeo
• 
  Bermeo
• 
  Bermeo
• 
  Tree o Gernika
• 
  Gernika
• 
  Meetin hoose o Biscay, Gernika
• 
  Europe Pairk, Gernika
• 
  Santimamiñe cave, Kortezubi
• 
  Oma firth, Kortezubi

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