| Carnetin | |
| Commune Status: | Commune |
| Coordinates: | 48.9011°N 2.7056°W |
| Insee: | 77062 |
| Postal Code: | 77400 |
| Arrondissement: | Torcy |
| Canton: | Lagny-sur-Marne |
| Mayor: | Pascal Leroy[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Marne et Gondoire |
| Elevation Min M: | 75 |
| Elevation Max M: | 130 |
| Area Km2: | 1.61 |
Carnetin (in French pronounced as /kaʁnətɛ̃/) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.
The inhabitants are called Carnetinois.