William Finley
William Finley or Finlay may refer to:
- William Finlay, Irish-born Canadian politician
- William Finlay (mayor), mayor of Albany, Western Australia
- William Finley (actor), American actor
- William Finley (Southern Railway), president of the Southern Railway in the United States, 1906–1913
- William A. Finley, president of Oregon State University, 1865–1872
- William L. Finley, American wildlife photographer and conservationist
- William Finlay, 2nd Viscount Finlay, British barrister and judge
- William Henry Finlay, South African astronomer
- Willie Finlay, Scottish footballer for East Fife and Clyde