| Altkirch | |
| Commune Status: | Subprefecture and commune |
| Image Flag: | Flag of Altkirch.gif |
| Image Coat Of Arms: | Blason Altkirch France Haut-Rhin.svg |
| Arrondissement: | Altkirch |
| Canton: | Altkirch |
| Insee: | 68004 |
| Postal Code: | 68130 |
| Mayor: | Nicolas Jander[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Sundgau |
| Coordinates: | 47.62°N 7.24°W |
| Elevation M: | 310 |
| Elevation Min M: | 274 |
| Elevation Max M: | 392 |
| Area Km2: | 9.54 |
| Dialling Code: | 0389 |
Altkirch (pronounced as /fr/, pronounced as /de/; gsw|label=[[Alsatian dialect|Alsatian]]|Àltkìrech) is a commune in the Haut-Rhin department in Alsace in north-eastern France.[2]
The town is traditionally regarded as the capital of Sundgau.
The name of the commune means old church (gsw-FR|Àlta Kìrch or Àlta Kìrech; de|Alte Kirche).
In the 1370s, the citizens of Altkirch made battle and won against a company of Gugler mercenaries.[3]
Its inhabitants are known as Altkirchois.
The resident population number of 5500 is rather deceptive as some 15,500 people will be in town on a typical working day (4500 working, 3000 studying, 3000 for medical treatment and another 5000 divided between shopping, administrative offices, cultural and sporting activities).