The station is at kilometric point 21.250 of Paris-Le Havre railway. It is inside a rail complex that includes a marshalling yard, a depot, and a maintenance establishment. This complex is the starting point of Achères-Pontoise railway. It is also crossed by Grande Ceinture line. Its altitude is 41 metres (135 ft).
After the classification yard extension and Achères-Pontoise railway was put into service, the station was given the name Achères-Embranchement in 1877. A second building was added next to the first in 1882.
During the 1920s, the name of the station became simply Achères. In 1931, level crossings on RN 184 were removed and a double bridge was built. The former station was neglected, and the current building was put in operation.
It was renamed Achères-Grand-Cormier when the Achères-Ville station was put into operation on Achères-Pontoise railway in 1976. A former stop, named Village d'Achères, used to be on this railway, but was destroyed by bombings during the night from 7 to 8 June 1944. It was not put into service again, but platforms are still visible.
In 2009, 330 people a day entered the station.
The station has two central platforms. Platform A is 226 metres (741 ft) long; platform B is 247 metres (810 ft) long.
The station is isolated inside the forest of Saint-Germain-en-Laye, on the road from Saint-Germain-en-Laye to Pontoise. Pedestrian access is on national route 184. At night, it is served by Noctilien bus line 152.
Freight is assumed by Achères-Triage station.
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- "Fret SNCF | SNCF". fret.sncf.com. Retrieved 4 May 2016.