Dannewerk
| Dannewerk Dannevirke | |
|---|---|
| Coordinates: 54°28′N 9°30′E / 54.467°N 9.500°E | |
| Country | Germany | 
| State | Schleswig-Holstein | 
| District | Schleswig-Flensburg | 
| Municipal assoc. | Haddeby | 
| Government | |
| • Mayor | Hermann Büll | 
| Area | |
|  • Total | 16.65 km2 (6.43 sq mi) | 
| Elevation | 20 m (70 ft) | 
| Population  (2023-12-31) | |
|  • Total | 1,132 | 
| • Density | 68/km2 (180/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| Postal codes | 24867 | 
| Dialling codes | 04621 | 
| Vehicle registration | SL | 
| Website | www.haddeby.de | 
Dannewerk (Danish: Dannevirke) is a municipality in Amt Haddeby in Schleswig-Flensburg District, Germany. It is named after the historic Danish Danevirke fortification.