Ciutadilla is a village and municipality in the comarca of Urgell in Catalonia, Spain. Its population in 2013 was 209.
The village, the only settlement in the municipality, is situated on a hill close to where the Montblanc-to-Tàrrega highway crosses the Corb river. Its ruined castle occupies a commanding position overlooking not just the village but also the plains of Urgell and Segarra. Many of the buildings in the village serve as holiday homes.
Ciutadilla village developed around its castle, and spread downhill. The castle is mentioned in extant 12th-century documents, and was significantly improved in the 16th century. It was badly damaged during the First Carlist War in 1835, and fell into ruins after that. The municipality's population reached a peak of 872 in 1887, but has since steadily declined with the rest of the region to 209 in 2013. Many archaeological remains from the Iberic, Greek and Roman periods have been found in the municipality.