| Image Coa: | DEU Lammershagen COA.svg |
| Coordinates: | 54.2667°N 36°W |
| Image Plan: | Lammershagen in PLOE.png |
| State: | Schleswig-Holstein |
| District: | Plön |
| Amt: | Selent/Schlesen |
| Elevation: | 49 |
| Area: | 25.97 |
| Postal Code: | 24238 |
| Area Code: | 04384 |
| Licence: | PLÖ |
| Gemeindeschlüssel: | 01 0 57 044 |
| Website: | www.amt-selent-schlesen.de |
| Mayor: | Wolfgang Radzuhn |
| Party: | SPD |
Lammershagen is a municipality in the district of Plön, in Schleswig-Holstein, Germany.