| Image Coa: | DEU Altenmedingen COA.svg |
| Coordinates: | 53.1328°N 10.6044°W |
| Image Plan: | Altenmedingen in UE.svg |
| State: | Niedersachsen |
| District: | Uelzen |
| Samtgemeinde: | Bevensen-Ebstorf |
| Elevation: | 54 |
| Area: | 48.09 |
| Postal Code: | 29575 |
| Area Code: | 05807 |
| Licence: | UE |
| Gemeindeschlüssel: | 03 3 60 001 |
| Divisions: | 9 |
| Website: | www.altenmedingen.de |
| Mayor: | Werner Marquard |
| Party: | CDU |
Altenmedingen is a municipality in the district of Uelzen, in Lower Saxony, Germany.