| Image Coa: | DEU Langenlehsten COA.svg |
| Coordinates: | 53.5°N 54°W |
| Image Plan: | Langenlehsten in RZ.svg |
| State: | Schleswig-Holstein |
| District: | Herzogtum Lauenburg |
| Amt: | Büchen |
| Elevation: | 26 |
| Area: | 23.37 |
| Postal Code: | 21514 |
| Area Code: | 04155 |
| Licence: | RZ |
| Gemeindeschlüssel: | 01 0 53 080 |
| Website: | www.buechen.de |
| Mayor: | Wilhelm Knoch |
Langenlehsten is a municipality in the district of Lauenburg, in Schleswig-Holstein, Germany.