Gentilly (French pronunciation: [ʒɑ̃tiji] ⓘ) is a commune in the southern suburbs of Paris, France.

It is the closest commune to Paris, located 4.1 km (2.5 mi) from the city center.

However, some other researchers think that the name is connected with Latin gentilis (meaning "gentile", "pagan", "foreigner") in reference to foreign goldsmiths who may have settled in Gentilly in the Early Middle Ages.

On 1 January 1860, the city of Paris was enlarged by annexing neighboring communes.

Saint-Saturnin welcomes all Christians, whereas the Sacré-Cœur de Gentilly is mainly a community for Portuguese Catholics.