Coordinates: 48°47′28″N 2°27′46″E / 48.7911°N 2.4628°E / 48.7911; 2.4628

Créteil (French pronunciation: [kʁe.tɛj]) is a commune in the southeastern suburbs of Paris, France. It is located 11.5 km (7.1 mi) from the center of Paris. Créteil is the préfecture (capital) of the Val-de-Marne department as well as the seat of the Arrondissement of Créteil. The city is, moreover, the seat of a Roman Catholic diocese (bishopric) and of one of France's 30 nationwide académies (districts) of the Ministry of National Education.

The name Créteil was recorded for the first time as Cristoïlum in the martyrology written by a monk named Usuard in 865. The name Cristoïlum is made of the Celtic word ialo (meaning "clearing, glade", "place of") suffixed to a pre-Latin radical crist- whose meaning is still unclear. Some believe crist is a Celtic word meaning "ridge", a cognate of Latin crista and modern French crête, in which case the meaning of Cristoïlum would be "clearing on the ridge" or "place on the ridge." A more traditional etymology was that crist referred to Jesus Christ, due to the very ancient presence of Christianity in Créteil and the veneration of Saint Agoard and Saint Aglibert, martyred in Créteil around AD 400.