William Jennings

• William Jennings , mayor of Salt Lake City, Utah, USA
• William M. Jennings, one time owner of the New York Rangers of the National Hockey League; the League annually gives out an award in his honour
• William Nicholson Jennings, photographer in Philadelphia
• W. Pat Jennings, Representative in the United States Congress from Virginia
• William Sherman Jennings, governor of Florida, United States
• William Thomas Jennings, New Zealand politician
• William Jennings , Dean of Gloucester, 1541–1565
• William Dale Jennings, American author of The Cowboys, The Ronin, and The Sinking of the Sarah Diamond
• Sir William Ivor Jennings, British lawyer and academic
• William Jennens, "William the Miser", "William the Rich", 'the richest commoner in England' who died intestate