Tonypandy tɒnəˈpændi is a town, community and electoral ward located in the county borough of Rhondda Cynon Taf, within the historic county boundaries of Glamorgan, Wales, lying in the Rhondda Fawr Valley. A former industrial coal mining town, the town was the scene of the 1910 Tonypandy riots.
The community boundaries of Tonypandy are drawn relatively tightly around the central part of the urban area. According to the 2011 UK Census, the population of the community was 3,750. The Office for National Statistics defines a larger "Tonypandy built-up area" covering much of the Rhondda Fawr valley and the lower Rhondda Fach valley, which had a population of 62,545 in 2011. They also define a smaller "Tonypandy built-up area sub division" which had a population of 17,789.
Tonypandy means fulling mill lea, from Welsh ton (archaic tonnau) for lea, layland, pasture, grassland or unploughed land; pannu for fulling and tŷ for house (cf. pandy). (See also Tonna.)
The Tonypandy area contains several prehistoric sites, the main one being Mynydd y Gelli. Located to the north-west of the town, the remains of an Iron Age settlement Hen Dre'r Gelli lies on the slopes of Mynydd Y Gelli hill between Tonypandy and Gelli. Near the same location are several Bronze Age cairns.
Tonypandy is also the site of one of two permanent Middle Ages fortifications found within the Rhondda Valley. Named Ynysygrug, it was a lesser motte and bailey earthwork defence consisting of a wooden tower surrounded by a small fortified courtyard. Built around the 12th or early 13th century, the remains of the fortification were mostly destroyed during railway construction works in the 19th century. The fortification was for many years wrongly thought to be the burial place of Rhys ap Tewdwr or a druidic worship site.
The regional library service recounts that the name 'Tonypandy' means the meadow of the fulling mill which was established there in 1838. "E. D. Lewis in his work The Rhondda Valleys provides us with an outline history of the mill that once stood in Tonypandy, and from which the town took its name".