Haddebyer Noor

54°29′36″N 09°34′28″E / 54.49333°N 9.57444°E / 54.49333; 9.57444Primary inflowsSelker NoorPrimary outflowsSchleiCatchment area36.2 km² (14.0 sq mi)Basin countriesGermanyMax. length1.6 km (0.99 mi)Max. width0.9 km (0.56 mi)Surface area1 km² (0.39 sq mi)Average depth3 m (9.8 ft)Max. depth5.2 m (17 ft)Water volume2,951,000 m³ (104,200,000 cu ft)Shore length¹4.8 km (3.0 mi)Surface elevation0 m (0 ft)¹ Shore length is not a well-defined measure.

Haddebyer Noor (Danish: 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 0 m (0 ft), its surface area is one km² (0.39 sq mi).