| Lahn | |
| Image Coa: | DEU Lahn (Huemmling) COA.gif |
| Coordinates: | 52.8167°N 44°W |
| Image Plan: | Lahn in EL.svg |
| State: | Niedersachsen |
| District: | Emsland |
| Samtgemeinde: | Werlte |
| Elevation: | 30 |
| Area: | 21.25 |
| Postal Code: | 49757 |
| Area Code: | 0 59 51 |
| Licence: | EL |
| Gemeindeschlüssel: | 03 4 54 027 |
| Website: | www.lahn-emsland.de |
| Mayor: | Bernhard Winkler |
| Party: | CDU |
Lahn is a municipality in the Emsland district, in Lower Saxony, Germany.