Donostialdea

Donostialdea is one of the eight regions of Gipuzkoa, Basque Autonomous Community, corresponding to the basin of the lower Urumea along with a strip of basin corresponding to the Oria River, the region borrowing its name after the capital city of Gipuzkoa Donostia-San Sebastian, in Spain. The region comprises eleven municipalities extending in an area of 305.72 km² (see below, data released in 2006). It borders in the east with the region or subcomarca of Oarsoaldea, on the south with Leitzaldea or Norte de Aralar in Spanish (Navarre), on the west with Urola Kosta and on the north with the Bay of Biscay.

#	Municipality	Mayor	Party	Population (2010)	% Population	Area km²
1	Donostia-San Sebastián	Juan Carlos Izagirre	Bildu	185,510	57.0	60.89
2	Errenteria	Julen Mendoza Pérez	Bildu	39,010	12.0	32.26
3	Hernani	Luis Intxauspe Arozena	Bildu	19,317	5.9	39.82
4	Lasarte-Oria	Pablo Barrio Ramírez	Bildu	17,863	5.5	6.01
5	Pasaia	Amaya Aguirregabiria Alberdi	Bildu	15,988	4.9	11.34
6	Andoain	Ana Maria Karrere Zabala	Bildu	14,670	4.5	27.17
7	Oiartzun	Aiora Pérez de San Román	Bildu	9,957	3.1	59.71
8	Urnieta	Mikel Pagola Tolosa	EAJ/PNV	6,166	1.9	22.4
9	Lezo	Ainhoa Zabalo Loyarte	Bildu	6,034	1.9	8.59
10	Usurbil	Mertxe Aizpurua Olano	Bildu	6,006	1.8	25.64
11	Astigarraga	Andoni Gartzia Arruabarrena	Bildu	4,714	1.4	11.89
	Donostialdea			325,235	100	305.72

43°19′17″N 1°59′08″W / 43.32139°N 1.98556°W / 43.32139; -1.98556