| Altenstadt | |
| Image Coa: | Wappen Markt Altenstadt.svg |
| Coordinates: | 48.1667°N 17°W |
| Image Plan: | Altenstadt in NU.svg |
| State: | Bayern |
| Region: | Schwaben |
| District: | Neu-Ulm |
| Verwaltungsgemeinschaft: | Altenstadt (Schwaben) |
| Elevation: | 530 |
| Area: | 31.30 |
| Postal Code: | 89281 |
| Area Code: | 08337 |
| Licence: | NU, ILL |
| Gemeindeschlüssel: | 09 7 75 111 |
| Divisions: | 7 quarters |
| Mayor: | Wolfgang Höß[1] |
| Leader Term: | 2020 - 26 |
| Party: | CSU |
Altenstadt is a municipality in the district of Neu-Ulm in Bavaria in Germany.
The municipality is located in middle Swabia in the valley of the Iller, about 30 km south of Ulm and 25 km north of Memmingen.
Altenstadt is arranged into 7 districts. The districts are: