| Image Coa: | DEU Müssen COA.svg |
| Coordinates: | 53.5°N 44°W |
| Image Plan: | Müssen in RZ.svg |
| State: | Schleswig-Holstein |
| District: | Herzogtum Lauenburg |
| Amt: | Büchen |
| Elevation: | 28 |
| Area: | 11.46 |
| Postal Code: | 21516 |
| Area Code: | 04151, 04155 |
| Licence: | RZ |
| Gemeindeschlüssel: | 01 0 53 092 |
| Website: | www.buechen.de |
| Mayor: | Detlef Dehr |
| Party: | AfD |
Müssen is a municipality in the district of Lauenburg, in Schleswig-Holstein, Germany.
Müssen (Muessen, see also Meissen) translates literally as "Mosses" or commonly as "Marsh."