Treharris is a town and also neighborhood (and also selecting ward) in the Taff Bargoed Valley in the south of Merthyr Tydfil County Borough, South Wales. It lies about 0.6 miles (1.0 km) west of Trelewis, where it is separated by the Taff Bargoed river, as well as 0.9 miles (1.4 km) from Nelson in Caerphilly region district and also has a population of 6,252, increasing to 6,356 at the 2011 Census. As a neighborhood, Treharris consists of the towns of Quakers Yard and Edwardsville. Because of steepness and also narrowness of both the Taff as well as Taff Bargoed valleys at Treharris numerous significant bridges as well as viaducts have been built in the area. Throughout the very early 21st century, like numerous ex-mining villages in the area, Treharris went through substantial regrowth to the town/village centre. Many, if not every one of the land where Deep Navigation was situated has actually been designed as well as is currently part of the new Parc Taff Bargoed, where a number of the regional football and also rugby teams train and play.