| Westensee | |
| Image Coa: | DEU Westensee COA.svg |
| Coordinates: | 54.2667°N 63°W |
| Image Plan: | Westensee in RD.png |
| State: | Schleswig-Holstein |
| District: | Rendsburg-Eckernförde |
| Amt: | Achterwehr |
| Elevation: | 19 |
| Area: | 40.47 |
| Postal Code: | 24259 |
| Area Code: | 04305 |
| Licence: | RD |
| Gemeindeschlüssel: | 01 0 58 171 |
| Website: | www.amtachterwehr.de |
| Mayor: | Adolf Dibbern |
Westensee (pronounced as /de/) is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany.
The location of Westensee is south of the municipality of Bredenbek or Felde, but north of Emkendorf or Langwedel, and west of Schierensee.