| Morschwiller-le-Bas | |
| Native Name: | Niedermorschwiller |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Morschwiller-le-Bas (68).svg |
| Arrondissement: | Mulhouse |
| Canton: | Kingersheim |
| Insee: | 68218 |
| Postal Code: | 68790 |
| Mayor: | Josiane Mehlen[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Mulhouse Alsace Agglomération |
| Coordinates: | 47.7367°N 7.2711°W |
| Elevation M: | 265 |
| Elevation Min M: | 248 |
| Elevation Max M: | 311 |
| Area Km2: | 7.55 |
Morschwiller-le-Bas (in French pronounced as /mɔʁʃvilɛʁ lə ba/;) is a commune located in the Haut-Rhin department of Alsace in north-eastern France. It is a part of the Mulhouse Alsace Agglomération, which serves as the inter-communal local government entity for the Mulhouse conurbation.[2]
Notably, Composer and organist Julien Koszul (1844–1927), who was the grandfather of both mathematician Jean-Louis Koszul and composer Henri Dutilleux, was born in Morschwiller-le-Bas.