| Ranspach-le-Bas | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Ranspach-le-Bas (68).svg |
| Arrondissement: | Mulhouse |
| Canton: | Saint-Louis |
| Insee: | 68263 |
| Postal Code: | 68730 |
| Mayor: | Sandra Muth[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Saint-Louis Agglomération |
| Coordinates: | 47.5881°N 7.4461°W |
| Elevation M: | 325 |
| Elevation Min M: | 302 |
| Elevation Max M: | 401 |
| Area Km2: | 4.43 |
Ranspach-le-Bas (German: Niederranspach) is a commune in the Haut-Rhin department in Alsace in north-eastern France.