Rioja [ˈrjoxa] is a wine region in Spain, with Denominación de Origen Calificada (D.O.Ca., "Qualified Designation of Origin"). Rioja wine is made from grapes grown in the autonomous communities of La Rioja and Navarre, and the Basque province of Álava. Rioja is further subdivided into three zones: Rioja Alta, Rioja Baja and Rioja Alavesa. Many wines have traditionally blended fruit from all three regions, though there is a slow growth in single-zone wines.

he three principal regions of La Rioja are Rioja Alavesa, Rioja Alta and Rioja Baja with each area producing its own unique expression of Rioja wine. Most of the territory subjected to the Rioja Protected designation of origin is in the La Rioja region, even though their limits do not coincide exactly. There is a narrow strip in the left bank of the Ebro river lying in the southernmost part of Álava included in the La Rioja wine region, whereas the south-southwestern part of the La Rioja region is not a part of this Protected designation of origin.