William Hayward may refer to: William Hayward (politician) (1868–1943), member of the New Zealand Legislative Council, 1934–1941 William Hayward Jr. (1787–1836), U.S. politician William Hayward Pickering (1910–2004), New Zealand rocket scientist William Dutton Hayward (1815–1891), founder and namesake of the city of Hayward, California William C. Hayward (1847–1917), American politician William Henry Hayward (1867–1932), English-born farmer and political figure in British Columbia Bill Hayward (1868–1947), track and field coach Bill Hayward (rugby union), rugby player William Hayward (bridge designer), 18th-century bridge designer as per Henley Bridge William S. Hayward (1835–1900), baker, banker and mayor of Providence, Rhode Island William Thornborough Hayward (1854–1928), medical doctor in South Australia William Hayward (Australian cricketer) (born 1930), Australian cricketer William Hayward (New Zealand cricketer) (1909–1982), New Zealand cricketer William Hayward (architect) (died 1823), architect who worked in Lincoln, England William Hayward, American lawyer who prosecuted Edward M. Fuller & Company