The station was opened by the Vale of Neath Railway in 1851, although tramways and railways had existed in the area for at least 60+ years due to the Hirwaun Ironworks and other industries. It existed on the VoR route between and , although the branch to opened first in 1851.
Operations
Although only a relatively small station serving an industrial community, Hirwaun was an important junction station for the VoNR. At Gelli Tarw Junction just north of the station, it merged three lines:
Dare Valley branch, initially to Bwllfa Colliery and then extended
The three platforms of the station were also supplemented by a brickworks just north of the station site. South of the station, there existed the goods yard and associated sidings, plus junctions for:
The Hirwaun Ironworks railway
Tower Colliery
Penderyn quarry tramway
Tir Herbert brickworks
Hirwaun Common railway
Between and Hirwaun, a distance of only, there were: five collieries; two quarries; and one gunpowder/silica factory. Each had their own private sidings, all to be tackled over the steep Glynneath embankment, which required a banking locomotive for northbound trains to be attached at. During World War II, the Royal Ordnance FactoryROF Hirwaun added to both the goods and passenger traffic load. In 1956, the station was used by HM Queen Elizabeth II during her visit to the village.
There was a dedicated rail link bus that linked with the community. It was only available to rail passengers, and operated to Penywaun, Hirwaun, Cefn Rhigos and Rhigos. Freight continues to run several times a day from Tower colliery, over track it owned north of the former station site. Although Tower's underground workings final ceased on 18 January 2008, DB Schenker Rail still run trains to the Tower washery, which depart Aberdare at 7 pm on Wednesdays, and 1130 on the Thursdays, Fridays and Saturdays, most often hauled by a Class 66. Freightliner also operate stone trains to Tower, but this service varies in schedule, again hauled by a Class 66.
Reopening
In November 2009 the Welsh Government asked Network Rail to conduct a feasibility study on reopening the line to Hirwaun for passenger services. It was announced in March 2011 that the Welsh Government’s 2011-12 capital programme would include the re-opening of the line to Hirwaun as part of the Cynon Valley Scheme. However, there is currently no information on when the work will commence. The line to this station has been identified by Campaign for a Better Transport as a priority 1 candidate for reopening.