John Francis Bannon

John Francis Bannon (1905 – June 5, 1986) was a Jesuit and a historian of the American West, especially of matters related to the Spanish borderlands.

Bannon received his bachelor's and master's degrees from Saint Louis University. He then completed his Ph.D. at the University of California, Berkeley. Bannon was a professor at Saint Louis University for several years. Bannon's work The Spanish Borderland Frontier, 1513-1821 published in 1970 is the seminal work on the subject.

Saint Louis University has a chair of history named for Bannon.