Located on the Biscayan coast on the left side of the Nervion estuary, it borders to the north with Santurtzi, Getxo and the sea; to the south with Trapagaran/Valle de Trápaga and Ortuella; to the east, with Leioa and Sestao; and, to the west, with Ortuella and Santurtzi.

It is situated on a hill whose slopes run down to the river estuary, the Ría, on one side, and to the River Ballonti on the other, with both waterways acting as its boundaries. Part of the district of Greater Bilbao, it is 13 km away from the city itself.