Humlebæk is a town within the municipality of Fredensborg in North Zealand in Denmark, approximately 35 km north of Copenhagen. Humlebæk is located at the shore to Øresund and has a population of 9,728 (2021).

The Louisiana Museum of Modern Art is located in Humlebæk.

The history of Humlebæk traces back to the 16th century where the urbarium for Kronborg and Frederiksborg fief mentions a fishing village in 1582-1583 with seven fishermen in the settlement.

On 24 July 1700 (O.S.) Swedish forces invaded Denmark at the landing at Humlebæk during the Great Northern War.

In 1740 the inn Humlebæk Kro received royal privilege and in 1792 a school was established.

The dominating property was Krogerup. Krogerup was originally a farm house mentioned the first time in 1577 but over time the property was expanded because of privileges given to the owners of Krogerup as rewards for loyalty to the King during the wars against Sweden. A manor house was built at Krogerup from 1772 to 1777. Krogerup was acquired by the Danish government in 1942 and the land distributed as part of land reforms.

During the Battle of Copenhagen in 1807 the construction of a fortified harbour in Humlebæk was initiated. The harbour was intended to be base of privateer warships and gunboats. The fortified harbour was never finished as the war against the British ended before the finalisation of the constructions. A few years later, in 1810, Humlebæk Harbour was established.

During the second half of the 19th century Humlebæk became a popular resort for the population of Copenhagen during summertime. The Danish steamship company Det Forenede Dampskibs-Selskab (The United Steamship Company) opened a ferry line with steamboats sailing up along the coast of Øresund from Copenhagen with a stop in Humlebæk.

In 1897 the rail line "The Coast Line" from Copenhagen to Helsingør was opened. The railway line had a stop in the newly established Humlebæk Station. The opening resulted in a major boost of Humlebæk and its surroundings. The train station was placed a bit outside the old village of Humlebæk, the fishing village Sletten and the nearby village Toelt. Over time the different settlements grew together. A new settlement grew from the train station to the coast (New Humlebæk, south of the Old Humlebæk next to Humlebæk Harbour). Until 1950 the three areas Humlebæk (New Humlebæk and the Old Humlebæk at the coast), Sletten and Torpen were considered separate settlements.