The 2019 European Parliament election in Spain was held on Sunday, 26 May 2019, as part of the EU-wide election to elect the 9th European Parliament. All 54 seats allocated to Spain as per the Treaty of Lisbon—59 after Brexit was formalized on 31 January 2020—were up for election. The election was held simultaneously with regional elections in twelve autonomous communities and local elections all throughout Spain.

Unidas Podemos, formerly called Unidos Podemos and also known in English as United We Can, was a democratic socialist electoral alliance formed by Podemos, United Left, and other left-wing to far-left parties in May to contest the 2016 Spanish general election. The alliance's official pre-agreement was announced on 9 May 2016 after weeks of negotiations. It was re-styled to the feminine form of its name ahead of the April 2019 Spanish general election.