The Western Suburbs Magpies is an Australian rugby league football club based in the western suburbs of Sydney, New South Wales. Formed in 1908, Wests, as the club is commonly referred to, was one of the nine foundation clubs of the first New South Wales Rugby League competition in Australia. The club, as a sole entity, departed the top-flight competition in 1999 after forming a 50–50 joint venture with Balmain Tigers to form the Wests Tigers. The club currently fields sides in the NSW State Cup, Ron Massey Cup (Opens), S.G. Ball Cup and Harold Matthews Cup competitions.

The Balmain Tigers are a rugby league club based in the inner-western Sydney suburb of Balmain. They were a founding member of the New South Wales Rugby League and one of the most successful in the history of the premiership, with eleven titles. In 1999 they formed a joint venture club with the Western Suburbs Magpies club to form the Wests Tigers for competition in the National Rugby League (NRL). They no longer field any senior teams in the lower divisions. At the time of the joint venture only South Sydney Rabbitohs and the St George Dragons had won more titles than the Tigers.