Crumlin High Level was located to the western bank of the famous Crumlin Viaduct on the Taff Vale Extension of the Newport, Abergavenny and Hereford Railway. It was closed in June 1964.
Crumlin Low Level was sited in the Ebbw Valley in the town centre. It was the joining point of the Beaufort Ironworks Tramway running to Ebbw Vale in the north, and the Monmouthshire Canal Tramway running to Newport in the south. It was closeed in 1962. As of 2008, the low-level line running through Crumlin resumed passenger services as the Ebbw Valley Line, with the nearest access being at Newbridge railway station.