Sir William Oldnall Russell (1785– 22 January 1833) was the Chief Justice of the Supreme Court at Calcutta.
He was born in 1785, the eldest son of Samuel Oldnall, rector of St. Nicholas, Worcester, and North Piddle, and Mary, daughter of William Russell of Powick.
He matriculated at Christ Church, Oxford, on 22 December 1801, and was a student till 1812.
He was called to the bar at Lincoln's Inn in 1809, became serjeant-at-law on 25 June 1827, and Chief Justice of Bengal in 1832, when he was knighted.
He had married, in 1825, Louisa Maria, daughter of John Lloyd Williams, and left children.