William Hewett may refer to:
Sir William Hewett (Lord Mayor) (c.1505–1567), Lord Mayor of London William Hewett (British Army officer) (1795-1891), soldier William Hewett (died 1840), Royal Navy officer and surveyor of the North Sea Sir William Hewett (1834–1888), Royal Navy officer and recipient of the Victoria Cross
See also William Hewitt (disambiguation) William Hewlett (disambiguation)