Penrith Brothers Rugby League Football Club is an Australian rugby league football club based in Penrith, New South Wales which was formed in 1968. It was initially known as St. Dominics RLFC but was rebranded as Penrith Brothers RLFC in 2003. On 22 March 2018, it was announced that Brothers Penrith would be fielding a team to compete in The Ron Massey Cup competition taking the place of The Auburn Warriors who became defunct. They also began fielding a team in The Sydney Shield competition for the 2018 season.