| Image Coa: | DEU Karby COA.svg |
| Coordinates: | 54.6167°N 67°W |
| Image Plan: | Karby in RD.png |
| State: | Schleswig-Holstein |
| District: | Rendsburg-Eckernförde |
| Amt: | Schlei-Ostsee |
| Elevation: | 5 |
| Area: | 2.09 |
| Postal Code: | 24398 |
| Area Code: | 04644 |
| Licence: | RD |
| Gemeindeschlüssel: | 01 0 58 087 |
| Website: | www.amt-schlei- ostsee.de |
| Mayor: | Thomas Becker |
Karby is a municipality in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany.