William Denny may refer to:

  • William Denny (MP) (1578–1625), English lawyer and politician
  • William Denny, deputy governor of the Province of Pennsylvania, 1756–1759
  • William Denny Jr. (born 1930), American politician in the Mississippi House of Representatives
  • William Denny and Brothers, British shipbuilder based in Dumbarton, Scotland
  • William Alexander Denny or Bill Denny (medical researcher) (born 1943), New Zealand chemist
  • William F. Denny (c. 1860–1908), American vaudeville performer and pioneer recording artist
  • William H. P. Denny (1811–1890), American newspaper editor and publisher and politician in Ohio
  • William Joseph Denny or Bill Denny (1872–1946), South Australian politician

See also

  • William D. Denney (1873–1953), American businessman and politician, Governor of Delaware