William McGregor
William McGregor may refer to:
- William McGregor (football), founder of the Football League
- William McGregor (judoka), Canadian Olympic judoka
- William McGregor (politician), Canadian businessman and political figure
- William McGregor (director), British screenwriter and director
- William B. McGregor, Australian linguist and professor
- William Roy McGregor, New Zealand zoologist and early conservationist
- Will McGregor (Wild Roses), a character on Wild Roses
- Billy McGregor, Australian rules footballer
- Bill McGregor, football player in the 1973 CFL draft
- Willie McGregor, Mansfield Town F.C. player
- Billy McGregor (ice hockey), ice hockey player in the 1938 Memorial Cup