The North Sea Cup was an open chess tournament played in Esbjerg, Denmark from 1976 to 2008.
In 1986 the titled section was the play-off for the Danish Chess Championship.
In 1987 the titled section was replaced by the Danish Juniors' Championship.
From 2004 the tournament has only one division, a nine- or ten-round Swiss system.
The North Sea Cup was not played in 2009.