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.
It is named after the Danish town Køge, which is located towards its southern part. The area around the bay's shores are built-up from Copenhagen to Køge, including Copenhagen suburban areas like Brøndby Strand, Vallensbæk, Ishøj, Hundige, Jersie and others. The seafloor is not located deeper than 10 metres (33 ft) anywhere inside the bay. 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.
The landing approaches to Copenhagen Airport runways 04L and 04R goes over the bay, it is used for approximately 30% of all landings.
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