William Legge, 2nd Earl of Dartmouth (1731-1801) was the son of George Legge, Viscount Lewisham and Elizabeth Kaye. He was baptised on the 9th of July1731 in St Marylebone Parish Church, London, England.
He married Frances Catherine Nicoll, daughter of Sir Charles Gounter Nicoll and Elizabeth Blundell, on 11 January 1755.
He died aged 70 on the 15th of July 1801.
He succeeded as the 2nd Earl of Dartmouth [G.B., 1711] on 15 December 1750.
He succeeded as the 3rd Baron Dartmouth, of Dartmouth, Devon [E., 1682] on 15 December 1750.
He succeeded as the 2nd Viscount Lewisham, of co. Kent [G.B., 1711] on 15 December 1750.
He was appointed Privy Counsellor (P.C.). He held the office of Recorder of Lichfield.