Today, Treherbert RFC plays in the Welsh Rugby Union Division Four South East league and are a feeder club for Cardiff Blues.

[1] In 1875, the newly established coal mines of Treherbert brought workers from Aberdare and Merthyr and with them the game of rugby;[2] and that year saw their first recorded rugby game between a team of players from Treherbert and a team from Merthyr who already had a well established "town" side.

The club's first major success came in 1889-90 by means of the Glamorgan League Championship, a title they were to win on another five occasions.

In 1929 Treherbert RFC disbanded due to financial troubles[4] and the remains of the team moved the mile up the valley to Blaenrhondda to merge with the smaller club.

now playing on Blaenrhondda Park won the Rhondda and East Glamorgan League in 1935-36 as well as winning the Coleman Cup twice.