Valderejo is a concejo in the municipality of Valdegovía/Gaubea, in Álava province, Basque Country, Spain.

It contains the hamlets of Lalastra [es] (the capital of the concejo) and Lahoz [es], as well as the depopulated settlements of Villamardones [es] and Ribera.

It is conterminous with the Valderejo Natural Park [es].

It was an independent municipality until 1966, when it was absorbed by Valdegovía.

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