Büsum is a fishing and tourist town in the district of Dithmarschen, in Schleswig-Holstein, Germany. It is situated on the North Sea coast, approx. 18 km southwest of Heide.
The Heide–Büsum railway is a line in the Dithmarschen district in the German state of Schleswig-Holstein, connecting the district seat of Heide with the North Sea resort of Büsum.