Urduña/Orduña (Basque: Urduña; Spanish: Orduña) is an exclave and municipality of 4,232 inhabitants located in the province of Biscay, in the autonomous community of Basque Country, in the North of Spain.

It is located in a plain in the highest part of the Nervión river valley, at the foot of the Sierra Salvada mountains.

The municipality contains the small exclave of Cerca de Villaño, surrounded by the neighbouring province of Burgos.

[2] Orduña is the final station of the commuter rail line C-3 that links the town with Bilbao.

This article about a location in the Basque Country, Spain, is a stub.