| Haddebyer Noor | |
| Other Name: | Haddeby Nor / Hedeby Nor |
| Location: | Schleswig-Holstein |
| Pushpin Map: | Schleswig-Holstein |
| Coords: | 54.4933°N 9.5744°W |
| Inflow: | Selker Noor |
| Outflow: | Schlei |
| Catchment: | 36.2km2 |
| Basin Countries: | Germany |
| Length: | 1.6km (01miles) |
| Width: | 0.9km (00.6miles) |
| Area: | 1km2 |
| Depth: | 3m (10feet) |
| Max-Depth: | 5.2m (17.1feet) |
| Volume: | 2951000m2 |
| Shore: | 4.8km (03miles) |
| Elevation: | 0m (00feet) |
Haddebyer Noor (da|Haddeby Nor or Hedeby Nor) is a lake – formerly a small arm of the Schlei inlet of the Baltic Sea – in Schleswig-Holstein, Germany. At an elevation of 0m (00feet), its surface area is 1km2.