The Port of Bilbao is located on the Bilbao Abra bay, and along the Estuary of Bilbao, in Biscay. The main facilities are in the Santurtzi and Zierbena municipalities, approximately 15 km (9.3 mi) west of Bilbao. Also called Exterior Port and Superpuerto, the port complex occupies 3.13 km2 of land and 16.94 km2 of water along 17 km (10.6 mi) of waterfront.

Biscay is a province of Spain and a historical territory of the Basque Country, heir of the ancient Lordship of Biscay, lying on the south shore of the eponymous bay. The capital and largest city is Bilbao.