| Image Coa: | DEU Langenaltheim COA.svg |
| Coordinates: | 48.9°N 66°W |
| Image Plan: | Langenaltheim in WUG.svg |
| State: | Bayern |
| Region: | Mittelfranken |
| District: | Weißenburg-Gunzenhausen |
| Elevation: | 555 |
| Area: | 39.05 |
| Postal Code: | 91799 |
| Area Code: | 09145 |
| Licence: | WUG |
| Gemeindeschlüssel: | 09 5 77 148 |
| Website: | www.langenaltheim.de |
| Mayor: | Alfred Maderer[1] |
| Leader Term: | 2020 - 26 |
| Party: | FW |
Langenaltheim is a municipality in the Middle Franconian district of Weißenburg-Gunzenhausen in Germany.