| Retzwiller | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Retzwiller (68).svg |
| Arrondissement: | Altkirch |
| Canton: | Masevaux-Niederbruck |
| Insee: | 68268 |
| Postal Code: | 68210 |
| Mayor: | Franck Grandgirard[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Sud Alsace Largue |
| Coordinates: | 47.6319°N 7.0939°W |
| Elevation M: | 315 |
| Elevation Min M: | 302 |
| Elevation Max M: | 392 |
| Area Km2: | 4.1 |
Retzwiller (in French pronounced as /ʁɛtsvilɛʁ/;) is a commune in the Haut-Rhin department in Alsace in north-eastern France.