The Mena Valley (Spanish: Valle de Mena) is a municipality of the province of Burgos, in the autonomous community of Castilla y León, Spain, that borders the provinces of Alava and Vizcaya (Basque Country) and Cantabria.
The municipality has 3,926 inhabitants distributed among 43 small villages, being its capital Villasana de Mena with 1.554 inhabitants.
Coordinates: 43°06′N 3°17′W / 43.100°N 3.283°W