Formed in 1989 by the amalgamation of St George and Port Hacking rugby clubs, with headquarters at Forshaw Park, Sylvania Waters, south of Sydney. The new club played in red, sky blue, white and black jumpers and fielded 6 grade teams, 3 colts' sides, and an under-19XV. Accommodation is limited at Forshaw Park to 2000 but the club has enjoyed splendid support since the amalgamation.

In recent years the club has enjoyed some of the benefits of a very successful junior development program. In 2011, the Southern Districts Second Grade team won the grand final of the Colin Caird Shield, defeating Eastwood 24 points to 16. In 2012, The Southern Districts First Grade team lost by one point in the Shute Shield Grand Final to Sydney University 15 points to 14. In 2014, The Southern Districts First Grade team were beaten by Eastwood 33 to 13 at Concord Oval.

The club currently fields four open Grade teams, three Colts teams and a women's 7's team which compete fiercely in all competitions.

The SDRC Development Program will assist in raising funds to continue to develop the club and attribute to ongoing on-field and off-field success.