The Coast Line (Danish: Kystbanen) is a regional railway line between Helsingør (Elsinore) and Copenhagen in Denmark. It was opened in 1897, and it is today the busiest railway line in Denmark. The Coast Line, along with an extensive network of railways in Scania, are run by DSB Øresund, part of DSB.

Its original terminus was Østerport Station, but when the station was connected with Copenhagen Central Station in 1917, the terminus moved there. When the Oresund Bridge opened in 2000, service extended to Malmö in Sweden, though the section between Copenhagen and Malmö is a separate railway, the Oresund Line.

The railway services some well-known sights and locations such as Louisiana Museum of Modern Art in Humlebæk, Kronborg Castle in Elsinore, and Dyrehavsbakken in Klampenborg.

Kystbanen is now an integrated part of (and served only by) the Oresundtrain network which also serves southern Sweden.

Plans for a railway between Copenhagen and Helsingør (Elsinore) had been proposed since the childhood of railways. The North Line was built though Helsingør in 1864 and in 1863 the connection between Copenhagen and Klampenborg Station as a sort of daytrip and tourist route. In 1890 the Minister of the Interior, Hans Peter Ingerslev (Conservative People's Party), a proposition of a state railway between Klampenborg and Helsingør, but it went four years of discussion and negotiations before the surveyors could stop their work and the construction workers enter the field.

...
Wikipedia