The station has a single island platform with a waiting hall, accessible via a pedestrian tunnel under the tracks.

The first station building, made of wood, was completed in 1862 on the northern side of the railway.

Due to increasing traffic, a second station building was opened in 1883 on the southern side, featuring a royal waiting room because Järna was the closest station to the royal palace at Tullgarn.

Postal services were also handled at the station, with royal correspondence being dispatched twice daily by courier to and from Tullgarn.

[3] The third and final station building, designed by architect Folke Zettervall, was completed in 1914.