| Dieffenthal | |
| Native Name: | Diefedàl |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Dieffenthal Bas-Rhin.svg |
| Arrondissement: | Sélestat-Erstein |
| Canton: | Sélestat |
| Insee: | 67094 |
| Postal Code: | 67650 |
| Mayor: | Charles Andrea[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Sélestat |
| Coordinates: | 48.3106°N 7.4203°W |
| Elevation Min M: | 188 |
| Elevation Max M: | 523 |
| Area Km2: | 1.51 |
Dieffenthal (in French pronounced as /difəntal/;) is a commune in the Bas-Rhin department in Alsace in north-eastern France.[2]