| Image Coa: | DEU Quarnbek COA.svg |
| Coordinates: | 54.3167°N 67°W |
| Image Plan: | Quarnbek in RD.png |
| State: | Schleswig-Holstein |
| District: | Rendsburg-Eckernförde |
| Amt: | Achterwehr |
| Elevation: | 15 |
| Area: | 16.17 |
| Postal Code: | 24107 |
| Area Code: | 04340 |
| Licence: | RD |
| Gemeindeschlüssel: | 01 0 58 130 |
| Website: | http://www.quarnbek.de |
| Mayor: | Herbert-Klaus Langer |
| Party: | Greens |
Quarnbek is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany.