Dowlais RFC is a Welsh rugby union club based in Dowlais near Merthyr, Wales. They club is a member of the Welsh Rugby Union and is a feeder club for the Cardiff Blues.
Although a Dowlais rugby club existed in the late 19th century, formed by workers of a local Victorain ironworks, the modern team is not affiliated to this older side. Dowlais RFC was formed in 1975 by Sid Hill, who had also formed youth teams in Cefn Coed and Merthyr. The team originally joined the East Glamorgan District Union, but in 2001 joined the Welsh Rugby Union and were placed in Division Seven East. The club currently fields a First XV, Second XV and Youth team.