Ernest Knapman (second ¼ 1899 – death unknown) was an English rugby union and professional rugby league footballer who played in the 1920s. He played representative level rugby union (RU) for England (non-Test), and , and at club level for [1], as a fullback, i.e. number 15, and representative level rugby league (RL) for Great Britain and England, and at club level for Oldham (Heritage № 205), as a fullback, i.e. number 1.