[2] The station was originally opened in 1901 under the name "Kullsta," but it was renamed "Nynäsgård" in 1916.

Originally, authorities considered naming the station "Gropen," referring to the excavation through the sand ridge during railway construction, but this was not approved.

[4] A station building was moved from Trångsund to Nynäsgård in 1932, along with the addition of an open waiting hall on one gable side.

[5] The former maintenance facility for Nynäs Line trains, which operated until 1962, now houses the Nynäshamn Railway Museum with vintage steam locomotives, railcars, and a preserved roundhouse.

The museum operates heritage trains on the Nynäs Line on occasion.