John Mahon

• John Mahon, baseball owner and politician
• John Mahon , musician and composer
• John Mahon , Australian rules footballer
• John Mahon , Irish footballer
• John Mahon , British communist political activist
• John Mahon , American film, stage and television actor
• John Mahon, drummer and vocalist with the Elton John Band
• John K. Mahon, historian
• John Lincoln Mahon, British socialist activist
• John Christopher Mahon, Irish-born priest in Kenya
• Sir John Denis Mahon, British scholar