Créteil is a commune in the southeastern suburbs of Paris, Île-de-France. It is located 11.7 km (7.3 mi) from the centre 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 and of one of France's 30 nationwide académies (districts) of the Ministry of National Education.

The Île-de-France is the most populous of the eighteen regions of France, with an official estimated population of 12,271,794 residents on 1 January 2023. Centred on the capital Paris, it is located in the north-central part of the country and often called the Paris Region. Île-de-France is densely populated and retains a prime economic position on the national stage, but it covers only 12,012 square kilometres, about 2% of metropolitan French territory. Its 2017 population was nearly one-fifth of the national total.