William "Digger" Roderick Robertson (6 October 1861 – 24 June 1938) was an Australian cricketer who played in one Test from 1 to 5 January 1885. A native of the New South Wales town of Deniliquin, near the Victoria border, Digger Robertson was a right-handed batsman with a leg break bowling style. He made his first-class debut for Victoria against the English touring team in November 1884, taking 3 for 36 and 5 for 46. After the Australian team for the First Test in December refused to play in the Second Test, Robertson was one of eight Test debutants selected. However, he took no wickets, Australia lost, and along with four of the other debutants, he played no further Test cricket.