William Johnstone
William Johnstone may refer to:
Arts
- William Johnstone (actor) , American actor
- William Johnstone (artist), Scottish artist
- William W. Johnstone, American author
- Will B. Johnstone, American writer
- William Borthwick Johnstone, Scottish painter, art collector, and gallery curator
Politics
- William A. Johnstone, member of the California legislature
- William Johnstone, 1st Marquess of Annandale, Scottish nobleman
- Sir William Johnstone, 2nd Baronet, Member of Parliament for Dumfries Burghs and Dumfriesshire
- Sir [William Pulteney, 5th Baronet], born William Johnstone, Scottish Member of Parliament
Sports
- Bill Johnstone (footballer, born 1900), Australian rules footballer for North Melbourne
- Bill Johnstone (footballer, born 1919), Australian rules footballer for Collingwood
- Bill Johnstone (Scottish footballer), Scottish footballer
- Billy Johnstone, Australian rugby league player
- William Johnstone (footballer), Scottish footballer
- William [Raphael Johnstone], Australian jockey