Heiligenhafen (German pronunciation: [haɪlɪɡənˈhaːfən]; Holsatian: Hilligenhaven) is a town in the district of Ostholstein, in Schleswig-Holstein, Germany.

It is situated on the Baltic Sea coast, opposite the island Fehmarn, approx.

Two headlands are located off the coast: Steinwarder and Graswarder, the latter one is a bird sanctuary.

A little fishing port and a marina with about 1000 moorings is located at the open part of the bight close to the town centre.

Tourism is an important part of the economy of the town.