William Hayward
William Hayward may refer to:
- William Hayward (bridge designer), 18th-century bridge designer as per Henley Bridge
- William Hayward (architect), architect who worked in Lincoln, England
- William Hayward Jr., U.S. politician
- William Hayward, English sailor and captain
- William Hayward (politician), member of the New Zealand Legislative Council, 1934–1941
- Bill Hayward, track and field coach
- William Hayward (American attorney), American lawyer commanded the 369th Infantry Regiment
- William Hayward (New Zealand cricketer), New Zealand cricketer
- Bill Hayward (educator), Australian educator and cricketer
- Bill Hayward (rugby union), rugby player
- William C. Hayward, American politician
- William Dutton Hayward, founder and namesake of the city of Hayward, California
- William Henry Hayward, English-born farmer and political figure in British Columbia
- William S. Hayward, baker, banker and mayor of Providence, Rhode Island
- William Thornborough Hayward, medical doctor in South Australia
- William Hayward Pickering, New Zealand rocket scientist