Robert Valentine (21 December 1877 – 16 January 1926) was an English rugby league and association football player. In association football, his regular position was as a goalkeeper, and he made ten first team appearances for Manchester United (1903–1908). He also played rugby league for Swinton. Valentine died at the original Salford Royal Hospital on Chapel Street/Adelphi Street, Salford in 1926 aged 48