| Maransin | |
| Commune Status: | Commune |
| Arrondissement: | Libourne |
| Canton: | Le Nord-Libournais |
| Insee: | 33264 |
| Postal Code: | 33230 |
| Mayor: | Bernard Bacci[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Libournais |
| Coordinates: | 45.0722°N -0.2669°W |
| Elevation M: | 52 |
| Elevation Min M: | 18 |
| Elevation Max M: | 101 |
| Area Km2: | 29.94 |
Maransin (in French pronounced as /maʁɑ̃sɛ̃/) is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.