Sir William Erle PC QC FRS (1 October 1793 – 28 January 1880) was an English lawyer, judge and Whig politician.
Born at Fifehead Magdalen, Dorset, William was the son of the Rev. Christopher Erle of Gillingham, Dorset and Margaret née Bowles, a relative of the poet William Lisle Bowles. His younger brother Peter Erle went on to be a Charity Commissioner. Erle was educated at Winchester School and at New College, Oxford where he graduated BCL in 1818 and held a fellowship until 1834. Having been called to the Bar at the Middle Temple on 26 November 1819 he went on the western circuit. Here he slowly acquired a reputation for thoroughness, rather than brilliance, and a fair share of remunerative practice. He was admitted ad eundem a member of the Inner Temple on 11 June 1822, and became a bencher of that society on 18 November 1834, and in 1844, Treasurer. He also purchased a warrant as counsel at the Palace Court which had jurisdiction in all private law actions within 12 miles (19 km) of Whitehall.