Zazpikaleak/Casco Viejo – Zazpikaleak and Casco Viejo – is a railway station in Bilbao, Basque Country, Spain. It is located in the historical neighborhood of Casco Viejo, in the district of Ibaiondo. It links the Bilbao metro rapid transit services with the Euskotren Trena commuter rail network. It is the main railway hub for trips between the metropolitan underground network and the railway services to Eibar, Gernika, Bermeo and San Sebastián as well as the Txorierri valley. The original metro station opened on 11 November 1995, and on 8 April 2017 in its current form.

The Bilbao metro is a rapid transit system serving the city of Bilbao and the region of Greater Bilbao. Lines 1 and 2 have a "Y" shape, as they transit both banks of the river Ibaizabal and then combine to form one line that ends in the south of Bilbao. Line 3 has a "V" shape connecting the municipality of Etxebarri with the Bilbao neighbourhood of Matiko; the apex of the "V" is Zazpikaleak/Casco Viejo station, where all three current lines meet. The metro is connected with the Bilbao tram, Bilboko Aldiriak, Euskotren Trena, Feve, Renfe long-distance trains, and Bilbao's bus station. All three lines use metre gauge.