Agiñaga[2] (officially; Spanish Aguíñiga) is a village in Álava, Basque Country, Spain.

[3] Agiñaga sits in the foothills of the Sierra Salbada to the north, between the Iturrigorri and Ungino peaks.

The first mention of Aguiñiga or Aginaga corresponds to the donation that Diego López of Lejarzo made to the monastery of San Millán in the year 1114.

He donated the monastery of San Clemente and Santa Cecilia of Obaldia, «with trees, mountains, meadows and pastures» along with Aguiñiga and Salmantón.

In toponymy, the name Menerdo indicates the presence of a plot of land which may be of Gothic origen.