| Altenhagen | |
| Coordinates: | 53.7667°N 20°W |
| Image Plan: | Altenhagen_in_MBS.svg |
| State: | Mecklenburg-Vorpommern |
| District: | Mecklenburgische Seenplatte |
| Amt: | Treptower Tollensewinkel |
| Elevation: | 92 |
| Area: | 11.05 |
| Postal Code: | 17091 |
| Area Code: | 039600 |
| Licence: | DM |
| Gemeindeschlüssel: | 13 0 71 002 |
| Divisions: | 3 Ortsteile |
| Website: | www.altentreptow.de |
| Mayor: | Marita Range |
Altenhagen is a municipality in the Mecklenburgische Seenplatte district, in Mecklenburg-Vorpommern, Germany.