The 2011 Spanish regional elections were held on Sunday, 22 May 2011, to elect the regional parliaments of thirteen of the seventeen autonomous communities—Aragon, Asturias, the Balearic Islands, the Canary Islands, Cantabria, Castile and León, Castilla–La Mancha, Extremadura, La Rioja, Madrid, Murcia, Navarre and the Valencian Community—, not including Andalusia, the Basque Country, Catalonia and Galicia, which had separate electoral cycles.

The week before the elections came dominated under the scope of the 15-M protests which had been held in different cities across Spain.

The PP won outright majorities in eight out of the thirteen communities holding elections, and was able to gain power in a further two either through agreements with other parties.

Determination of election day varied depending on the autonomous community, with each one having competency to establish its own regulations.

In other cases—namely, Aragon, the Balearic Islands, Castile and León, Extremadura, Navarre and the Valencian Community—, the law granted presidents the power to call a snap election resulting in a fresh four year-parliamentary term.