Penarth railway station is the railway station serving the town of Penarth in the Vale of Glamorgan, South Wales. It is the terminus of Network Rail's Penarth branch running from Cogan Junction to Penarth station, 1 mile 12 chains from the junction and 2 miles 67 chains south of Cardiff Central station. The Penarth branch ran from Cogan Junction to Biglis Junction, a rail mileage of 5 miles 65 chains and was officially closed beyond Penarth after the last passenger train ran on Saturday 4 May 1968.

The Vale of Glamorgan, locally referred to as The Vale, is a county borough in the south-east of Wales. It borders Bridgend County Borough to the west, Cardiff to the east, Rhondda Cynon Taf to the north, and the Bristol Channel to the south. With an economy based largely on agriculture and chemicals, it is the southernmost unitary authority in Wales. Attractions include Barry Island Pleasure Park, the Barry Tourist Railway, Medieval wall paintings in St Cadoc's Church, Llancarfan, Porthkerry Park, St Donat's Castle, Cosmeston Lakes Country Park and Cosmeston Medieval Village. The largest town is Barry. Other towns include Penarth, Llantwit Major, and Cowbridge. There are many villages in the county borough.