Køge Bay (Danish: Køge Bugt) is an approximately 500 square kilometres (190 sq mi) shallow Danish bay in the southern part of Øresund, between Greater Copenhagen area in the North (or more precisely the southernmost peak of Amager) and Stevns Klint in the South, and as a part of Zealand.
[1] Due to its closeness to the Baltic Sea, the average surface salinity is lower than elsewhere in Øresund, especially when compared to the northern parts of this sound.
[2] In 1427, a Kalmar Union fleet was resoundingly victorious in a sea battle against the Hanseatic League.
1 July 1677, a sea battle between a Dano-Norwegian and a slightly larger Swedish fleet occurred in the bay.
In August 2017, Swedish journalist Kim Wall was murdered in the bay by entrepeuner Peter Madsen on board his submarine UC3 Nautilus.