| Cavalaire-sur-Mer | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Cavalaire-sur-Mer (Var).svg |
| Arrondissement: | Draguignan |
| Canton: | Sainte-Maxime |
| Insee: | 83036 |
| Postal Code: | 83240 |
| Mayor: | Philippe Leonelli[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.1719°N 6.5297°W |
| Elevation M: | 150 |
| Elevation Min M: | 0 |
| Elevation Max M: | 528 |
| Area Km2: | 16.74 |
Cavalaire-sur-Mer (in French pronounced as /kavalɛʁ syʁ mɛʁ/, literally Cavalaire on Sea; Occitan (post 1500);: Cavalaira de Mar|label=[[Provençal dialect|Provençal]] or simply Cavalaira) is a commune in the Var department in the Provence-Alpes-Côte d'Azur region, southeastern France.
Cavalaire-sur-Mer is probably derived from an ancient Phoenician colony of the name of Heraclea Caccabaria. There are also remains of a Gallo-Roman occupation in Pardigon.
The town was detached from Gassin in 1929.
It is located on the route of the old railway Saint Raphael–Toulon (sometimes called Train Pignes), now defunct. The old railway line can still be seen throughout the town, with the old station situated near the harbour and now hosting a museum.
During World War II, on August 16, 1944, it was one of the sites of a beach landing in Operation Dragoon, the Allied invasion of southern France. Every year, August 15 sees a parade of military vehicles and the reconstruction of a military camp.
Its sister city is New Port Richey, Florida in the United States.