The Hornbæk Line is a 24.5 km (15.2 mi) long standard gauge single track local passenger railway line north of Copenhagen, Denmark. It runs along the coast of Øresund between Helsingør and Gilleleje, through an area with many holiday homes. The name Hornbækbanen refers to the town Hornbæk about halfway between Helsingør and Gilleleje.

The section from Helsingør to Hornbæk opened in 1906, and the section from Hornbæk to Gilleleje in 1916.