| La Frette-sur-Seine | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr La Frette-sur-Seine (Val-d'Oise).svg |
| Coordinates: | 48.975°N 2.1794°W |
| Arrondissement: | Argenteuil |
| Canton: | Herblay-sur-Seine |
| Intercommunality: | CA Val Parisis |
| Mayor: | Philippe Audebert[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 22 |
| Elevation Max M: | 81 |
| Area Km2: | 2.02 |
| Insee: | 95257 |
| Postal Code: | 95530 |
La Frette-sur-Seine (in French pronounced as /la fʁɛt syʁ sɛn/, literally La Frette on Seine) is a commune in the Val-d'Oise department in Île-de-France in northern France.