Sidney "Sid" Rix (third ¼ 1898 – death unknown) was an English professional rugby league footballer who played in the 1910s, 1920s and 1930s. He played at representative level for Great Britain and England, and at club level for Oldham (Heritage № 179), as a wing, or centre, i.e. number 2 or 5, or, 3 or 4.