William Kirk
William Kirk may refer to:
- William Arthur Kirk, American mathematician
- William Astor Kirk,, American civil rights activist and author
- William F. Kirk,, American baseball writer and poet
- Billy Kirk, rugby league footballer of the 1930s for England, and Warrington
- William Kirk,, English cricketer
- William L. Kirk,, American air force officer
- William Umpleby Kirk,, photographer
- Bill Kirk, American baseball player
- William Kirk,, Member of the UK Parliament for Newry
- William Kirke, MP for Clitheroe
- Will Kirk, Furniture restorer The Repair Shop