| Altenach | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville d'Altenach (68).svg |
| Arrondissement: | Altkirch |
| Canton: | Masevaux-Niederbruck |
| Insee: | 68002 |
| Postal Code: | 68210 |
| Mayor: | Jean-Luc Lamère[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 47.6072°N 7.1125°W |
| Elevation M: | 325 |
| Elevation Min M: | 313 |
| Elevation Max M: | 386 |
| Area Km2: | 6.18 |
Altenach (in French pronounced as /altənak/; Swiss German; Alemannic; Alsatian: Àltanàch) is a commune in the Haut-Rhin department in Alsace in north-eastern France.[2]