Hølen is a village and former town and municipality in Akershus county, Norway.
Hølen was in early times known for the production of timber, and from the 17th century important trade took place.
Son and Hølen were separated as municipalities of their own January 1, 1848.
Hølen was merged with the rural municipality Vestby July 1, 1943 – and it then lost its status as a town.
Hølen Station opened in 1931 and remained in use until 1996, when it and the viaduct were closed and the railway rerouted via the Hølendalen Bridges.