John Shanssey (March 23, 1848 – 1919?) was an American boxer, gambler, saloon owner, and Mayor of Yuma, Arizona. He fought Mike Donovan in a bout refereed by a young 21-year-old Wyatt Earp on July 4, 1868, or 1869 in Cheyenne, Wyoming. Shanssey is an alternative spelling, based on local Irish pronunciation, of the Irish surname Shaughnessy.
References
City of Yuma