Let us know.      Local Picture Gallery   View our Picture Galleries for: Treorchy Mid-Glamorgan Treochy IndoorMarket      About your Area   Treorchy Welsh : Treorci Treorchy shown within the United Kingdom Population 8105 (2001)) [1] OS grid reference SS955965 Principal area Rhondda Cynon Taff Ceremonial county Mid Glamorgan Constituent country Wales Sovereign state United