The 2023 Castilian-Manchegan regional election was held on Sunday, 28 May 2023, to elect the 11th Cortes of the autonomous community of Castilla–La Mancha. All 33 seats in the Cortes were up for election. The election was held simultaneously with regional elections in eleven other autonomous communities and local elections all throughout Spain.

The Cortes of Castilla–La Mancha is the unicameral legislature of Castilla–La Mancha, an autonomous community of Spain. The Cortes consists of 33 elected deputies. The Cortes of Castilla–La Mancha represent the popular will through 33 deputies elected by universal adult suffrage through the secret ballot.