When the Trunk Line opened as the first railway in Norway on 1 September 1854, Bryn was merely a halt used to test brakes for west-bound trains towards Christiania.
The station was named for the farm Bryn, which means "natural meadow".
It was not classified as a station, but it was therefore possible to board and disembark in that direction.
From 2 June 1856 trains in both direction stopped at Bryn.
In the third year of operations the railway built a spur from the halt.
Bryn received a ticket office the following year and in about 1860 it was fully classified as a station.

The area saw a rapid industrialization with the arrival of the railway, helped by the falls in Alna.
Soon afterwards housing started being built in the area.
The original wooden station building at Bryn was demolished, and replaced with a new in brick in 1884.

By the 1890s the Trunk Line was experiencing sufficient traffic that the railway company decided to built double track on the line from Christiania to Lillestrøm Station.
At the same time a new freight line, the Loenga–Alnabru Line, was constructed and met up with the Trunk Line at Bryn.
This forced the need for a new station building on the opposite, north side of the tracks, which opened in 1902.
The former station building was kept and used as a residence for the station master.
At the same time the two roads which crossed the tracks as level crossings were replaced with bridges.
With the upgrades a simple interlocking system was installed.

The Østensjø Line of the Oslo Tramway opened past Bryn in 1923.
The railway past the station was electrified from on 1 September 1927.
The station received a complete interlocking system from 23 April 1939.
 The tram line was converted to a metro line in 1966.
Bryn Station received centralized traffic control from 24 January 1972, allowing it to be unmanned from 1 July 1975.
When the Trunk Line opened as the first railway in Norway on 1 September 1854, Bryn was merely a halt used to test brakes for west-bound trains towards Christiania. The station was named for the farm Bryn, which means "natural meadow". It was not classified as a station, but it was therefore possible to board and disembark in that direction. From 2 June 1856 trains in both direction stopped at Bryn. In the third year of operations the railway built a spur from the halt. Bryn received a ticket office the following year and in about 1860 it was fully classified as a station.
The area saw a rapid industrialization with the arrival of the railway, helped by the falls in Alna. Soon afterwards housing started being built in the area. The original wooden station building at Bryn was demolished, and replaced with a new in brick in 1884.
By the 1890s the Trunk Line was experiencing sufficient traffic that the railway company decided to built double track on the line from Christiania to Lillestrøm Station. At the same time a new freight line, the Loenga–Alnabru Line, was constructed and met up with the Trunk Line at Bryn. This forced the need for a new station building on the opposite, north side of the tracks, which opened in 1902. The former station building was kept and used as a residence for the station master. At the same time the two roads which crossed the tracks as level crossings were replaced with bridges. With the upgrades a simple interlocking system was installed.
The Østensjø Line of the Oslo Tramway opened past Bryn in 1923. The railway past the station was electrified from on 1 September 1927. The station received a complete interlocking system from 23 April 1939.  The tram line was converted to a metro line in 1966. Bryn Station received centralized traffic control from 24 January 1972, allowing it to be unmanned from 1 July 1975.
Bryn Station