| Leezen | |
| Image Coa: | DEU Leezen COA.svg |
| Coordinates: | 53.8667°N 10.2528°W |
| Image Plan: | Leezen in SE.svg |
| State: | Schleswig-Holstein |
| District: | Segeberg |
| Amt: | Leezen |
| Elevation: | 29 |
| Area: | 14.98 |
| Postal Code: | 23816 |
| Area Code: | 04552 |
| Licence: | SE |
| Gemeindeschlüssel: | 01 0 60 053 |
| Divisions: | 3 |
| Website: | https://leezen-sh.de/ |
| Mayor: | Ulrich Schulz |
Leezen is a municipality in the district of Segeberg, in Schleswig-Holstein, Germany. It is situated approximately 40 km northeast of Hamburg, and 9 km southwest of Bad Segeberg.
Leezen is the seat of the Amt ("collective municipality") Leezen.