Albariño is a variety of white wine grape grown in Spain and northern Portugal, where it is used to make popular varietal white wines that are among the most expensive white wines of the Iberian Peninsula.

It is principally grown in the Galicia region of north-west Spain, most notably in the highly-prized Rías Baixas DO. It is also common in the Vinho Verde region of Portugal in such towns as Monção, and despite its popularity in both countries has yet to achieve interest from winemakers of other countries. In these regions, it is used to produce varietal wine with 100% Albariño grapes.

In other locations such as Ribeiro, Lima, Braga or Valdeorras it is often mixed with other grapes such as Loureiro, Caiño, Arinto or Treixadura to produce blended wines.

The grape is famed for its distinctive aroma, very similar to that of Viognier, suggesting apricot and peach. The wine produced is unusually light, and generally high in acidity. Its thick skins and large number of pips on the other hand can often cause residual bitterness. Its vines are also notoriously difficult to ripen, even in the hot summers of the peninsula, though this is often due to over-crowding of vines by the winemakers.

Albariño is actually the Spanish name for the grape, with Albarín Blanco an occasional synonym. In Portugal it is known as Alvarinho, and sometimes as Cainho Branco. It is thought by some to be a Riesling clone originating from the Alsace region of France although some believe that the grape is actually a close relative of the French grape Petit Manseng.

It should not be confused with the Alvarinho Liláz grape of Madeira.