Gentilly may refer to:
- France
- Gentilly, Val-de-Marne, a commune of the Val-de-Marne département
- Canada
- Gentilly, Quebec, a suburb of the city of Bécancour
- Gentilly Nuclear Generating Station
- United States
- Gentilly, New Orleans, Louisiana, a neighborhood
- Bayou Gentilly, a former bayou in the New Orleans area
- Gentilly Township, Minnesota