The 2009 Harlequins Rugby League season was the thirtieth in the club's history and their fourteenth season in the Super League. The club was coached by Brian McDermott, competing in Super League XIV, finishing in 11th place and reaching the Fourth round of the 2009 Challenge Cup. Harlequins RL – the only team in the Super League based in a capital city (London) attracted an average home crowd of just under 3,500.