John Mahon

John Mahon may refer to:

• John Mahon (baseball), baseball owner and politician
• John Mahon (composer) (1749–1839), musician and composer
• John Mahon (Australian footballer) (1940–2014), Australian rules footballer
• John Mahon (Irish footballer) (born 1999), Irish footballer
• John Mahon (politician) (1901–1975), British communist political activist
• John Mahon (actor) (1938–2020), American film, stage and television actor
• John Mahon, drummer an vocalist with the Elton John Band
• John K. Mahon (1912–2003), historian
• John Lincoln Mahon (1865–1933), British socialist activist
• John Christopher Mahon (1922–2004), Irish-born priest in Kenya
• Sir John Denis Mahon (1910–2011), British scholar