Philip Leonidas Cannon (June 28, 1850 – August 11, 1929) was the first Lieutenant Governor of Delaware from January 15, 1901 to January 17, 1905. Cannon, the son of former Governor William Cannon and Magaret Ann Barker, was the first elected to the office under the Delaware Constitution of 1897, and served under 53rd Governor John Hunn.
Cannon married Hester Polk. Cannon studied at Dickinson College but did not graduate. For a time he was involved in farming with his brother Henry Laws Cannon. They also for a time ran a canning factory.