Ynysybwl Rugby Football Club is a Welsh rugby union team based in Ynysybwl. Today, Ynysybwl RFC plays in the Welsh Rugby Union, Division Two East League and is a feeder club for the Cardiff Blues.
Ynysbwl RFC became a member of the Welsh Rugby Union in 1880, so there is a likelihood of rugby being played before this date but there is no reliable source to corroborate this. In the years between 1945 and 1955 Ynysybwl played in the Glamorgan League and Cup with other local clubs such as Pontypridd RFC, Ebbw Vale RFC and Glamorgan Wanderers. From the 1980's the club joined the Mid District League.
- 1998/99 Glamorgan County Silver Ball Trophy - Winners
- 2005/06 Glamorgan County Silver Ball Trophy - Winners
- 2005/06 Glamorgan County President's Cup - Winners