William Buchanan
William or Bill Buchanan may refer to:
- William Buchanan , Irish-born Canadian Conservative politician
- William Buchanan , designed trains for the New York Central
- William Buchanan , Australian pastoralist and gold prospector
- William Buchanan , Scottish amateur footballer
- William Buchanan , British art dealer
- William Izett Buchanan, American expatriate basketball player
- William I. Buchanan, American diplomat
- William Ashbury Buchanan, journalist, publisher and politician based in Alberta
- William Murdoch Buchanan, Canadian politician and dentist
- Bill Buchanan, a fictional character in 24
- Bill Buchanan , Scottish computer scientist
- Bill Buchanan , American songwriter
- Billy Buchanan, Scottish footballer with Carlisle United and Barrow