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 and 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