The 2011 Spanish local elections were held on Sunday, 22 May 2011, to elect all 68,230 councillors in the 8,116 municipalities of Spain and all 1,040 seats in 38 provincial deputations. The elections were held simultaneously with regional elections in thirteen autonomous communities, as well as local elections in the three foral deputations of the Basque Country and the eleven island councils in the Balearic and Canary Islands.

The anti-austerity movement in Spain, also referred to as the 15-M Movement, and the Indignados Movement, was a series of protests, demonstrations, and occupations against austerity policies in Spain that began around the local and regional elections of 2011 and 2012. Beginning on 15 May 2011, many of the subsequent demonstrations spread through various social networks such as Real Democracy NOW and Youth Without a Future.