They formed in 1886 and by 1891 were a strong voice in the Welsh Football Union and were playing in the Rhondda Division.

[2] With the industrialisation of the Rhondda, the game of rugby spread through the valley as the growing population looked for social activities to become involved in.

In the opening game of the 1886 Home Nations Championship, Treorchy provided the first 'Rhondda forward' when Sam Ramsey was selected to face England.

Although Ramsey would only win two caps, and the second took a wait of eight years, Treorchy would provide several players throughout their history, including Billy Cleaver who would eventually play for the British Lions In 1907, Treorchy was accused of throwing a rugby game against Aberdare, which gave Aberdare the Glamorgan League title.

[3] As Treorchy finished in the top four of the WRU premier division during the 1994/95 season they were given the privilege of hosting that year's touring international team Fiji.