William Milne
William Milne may refer to:
- William Milne (missionary), British Protestant missionary to China
- Sir William Milne (politician), South Australian wine merchant and politician
- William Milne (sport shooter), British sport shooter
- William J. Milne (educator), American educator and administrator
- William Johnstone Milne, Canadian soldier
- William Milne (rugby union), Scottish rugby union player
- Billy Milne, Scottish footballer
- Willie Milne, Scottish golfer
- William Grant Milne, Scottish botanist
- William Charles Milne, missionary to China
- Ross Milne (Canadian politician), Canadian politician
- Sandy Milne, Scottish nationalist politician