| Type: | Ortsteil |
| Municipality: | Boren |
| Image Coa: | Kiesby Wappen.png |
| Coordinates: | 54.6222°N 9.8194°W |
| State: | Schleswig-Holstein |
| District: | Schleswig-Flensburg |
| Elevation: | 16 |
| Area: | 3.66 |
| Population: | 220 |
| Stand: | 2006-12-31 |
| Postal Code: | 24392 |
| Area Code: | 04641 |
| Licence: | SL |
| Website: | www.suederbrarup.de |
Kiesby (da|Kisby) is a village and a former municipality in the district of Schleswig-Flensburg, in Schleswig-Holstein, Germany. Since 1 March 2013, it is part of the municipality Boren.