William Fleetwood (1656–1723) was Bishop of St Asaph and Bishop of Ely.
William Fleetwood may also refer to: William Fleetwood (judge) (c. 1535–1594), English barrister, politician, and judge William Fleetwood (died 1630) (1563–1630), English politician William Fleetwood (1603–1674), English courtier and politician
See also William Fleetwood Sheppard (1863–1936), Australian-British civil servant, mathematician and statistician