The Kingdom of Viguera (Basque: Viguerako Erresuma) was a small ephemeral subsidiary kingdom centered on the town of Viguera from 970 into the early 11th century. The kingdom was created by King García Sánchez I of Pamplona for the eldest son of his second marriage, Ramiro Garcés, who became the first king of Viguera. He was succeeded by two sons who ruled jointly, but on the death of the survivor of the two, sometime between 1005 and 1030, Viguera was reabsorbed into the main Pamplona kingdom.

The kingdom was carved out of the south of the Kingdom of Pamplona. Its territory encompassed the valleys of the Iregua and Leza rivers in the heartland of the present-day Rioja. It probably also included Meltria. It was an artificial creation, lacking ethnic or geographical distinctness. The kings of Viguera were always subject to their superiors ruling in Pamplona. After 1005, the territory ceased to be a separate kingdom and became just another tenancy of the crown.