Bannon is an Irish surname. The following are people bearing that surname:

• Ann Bannon (born 1932), American author of lesbian pulp fiction novels
• Bernard Bannon (1874−1938), English cricketer
• Bonnie Bannon (1913–1989), American actress, model, dancer
• Brian Bannon (1930–2017), Australian politician from New South Wales
• Bruce Bannon (born 1951), American professional football player
• Chad Bannon (born 1970), American television and film actor
• Christine Bannon-Rodrigues (born 1966), American martial artist and actress
• David "Race" Bannon (born 1963), American fraudster who posed as a former Interpol agent
• "Des" Bannon (1923–2000), Australian rugby player
• Dorothy Bannon (1885–1940), British nurse
• Eamonn Bannon (born 1958), Scottish football player
• Henry T. Bannon (1867–1950), U.S. Congressman from Ohio (1905–1909), historian, and attorney
• J.G. Bannon (1874–1937), American college football coach
• Jack Bannon (1940–2017), American television actor
• Jacob Bannon (born 1976), American musician and artist
• James Bannon (disambiguation)
• Jim Bannon (1911–1984), American radio and film actor
• Jimmy Bannon (1871–1948), American baseball player
• John Bannon (1829–1913), Irish Catholic priest
• John Bannon (1943–2015), Australian politician and academic
• Kevin Bannon (born 1957), American basketball coach
• Paul Bannon (fl. 2006–2013), Gaelic footballer (with about 6 seasons of league play)
• Paul (Anthony) Bannon (1956–2016), Irish player of association football, 1975 to 1995 (with less than a season of league play of Gaelic football)
• Philip M. Bannon (1872–1940), American Marine Corps Brevet Medal recipient
• Rylan Bannon (born 1996), American baseball player
• Séamus Bannon (1927–1990), Irish retired sportsman
• Shane Bannon (born 1989), American football player
• Steve Bannon (born 1953), American media executive, political strategist, and former investment banker