Taffs Well railway station is a railway station serving the village of Taff's Well, Rhondda Cynon Taf, Wales, as well as neighbouring Gwaelod-y-Garth, Cardiff. It is located on the Merthyr Line and the Rhondda Line. Passenger services are provided by Transport for Wales.

Taff's Well is a semi-rural village, community and electoral ward located at the south easterly tip of Rhondda Cynon Taf, 6 miles (9.7 km) to the north of Cardiff, the capital city of Wales. Known locally as the 'Gates to the Valleys', it is separated from Gwaelod-y-Garth by the River Taff. Taff's Well is distinguished because it contains the only thermal spring in Wales. The tepid water is thought to rise along a fault-line from the Carboniferous Limestone, in somewhat similar manner to the warm springs at Bristol and Bath. Various religious groups regard it as a spiritual site.