| Type: | Ortsteil |
| Municipality: | Steinbergkirche |
| Image Coa: | Quern Wappen.png |
| Coordinates: | 54.75°N 52°W |
| State: | Schleswig-Holstein |
| District: | Schleswig-Flensburg |
| Elevation: | 24 |
| Area: | 22.74 |
| Population: | 1289 |
| Stand: | 2013 |
| Postal Code: | 24972 |
| Area Code: | 04632 |
| Licence: | SL |
Quern (da|Kværn) is a former municipality in the district of Schleswig-Flensburg, in Schleswig-Holstein, Germany. Since 1 March 2013, it has been part of the municipality of Steinbergkirche.