William Harding may refer to:
Politics
William Harding (politician) (1835–1903), Australian politician
William L. Harding (1877–1934), Republican Governor of Iowa from 1917 to 1921, best remembered for the "Babel Proclamation" William Neville Harding (1893–1978), Lord Mayor of Sydney
Sports
William Harding (footballer) (1883–1967), English footballer
William Harding (sport shooter) (1910–1936), American sports shooter
Halley Harding (William Claire Halley Harding, 1904–1967), American baseball player and sportswriter
Others
William Harding (Virginia witch trials) (c. 1625), first person convicted of witchcraft in Virginia Colony William Harding (yeoman) (1643–1718), British yeoman and founder of a charity in 1719 to clothe and educate poor children in the hamlet of Walton, Aylesbury William Harding (antiquary) (1792–1886), antiquary and British army officer William Giles Harding (1808–1886), American heir, Southern planter, horse breeder and Confederate general William James Harding (1826–1899), New Zealand photographer William P. G. Harding (1864–1930), American banker, former Federal Reserve Chairman Ali Eisami (aka William Harding, born 1786/1787), Kanuri man who lived in Sierra Leone