[1] Hvalsø railway station is situated on the Northwest Line from Roskilde to Kalundborg.

[2] It offers regional rail services to Holbæk, Roskilde and Copenhagen operated by the national railway company DSB.

[2] Hvalsø became a short-lived railway junction in the period when the Central Zealand railway line between Ringsted and Frederikssund crossed the Northwest Line here.

[2] The original and still existing station building from 1874 was designed by the Danish architect Niels Peder Christian Holsøe (1826–1895), known for the numerous railway stations he designed across Denmark in his capacity of head architect of the Danish State Railways.

[3] The station offers frequent regional rail services to Holbæk, Roskilde and Copenhagen operated by the national railway company DSB.