Tom McMahon, American politician and former mayor of Reading, Pennsylvania
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Sir Thomas McMahon, 2nd Baronet (1779–1860), Commander-in-chief of Bombay, 1840–1847
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Thomas A. McMahon (1943–1999), novelist and Professor of Applied Mechanics and Biology at Harvard University
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Thomas J. McMahon (1948–1969), American soldier and Medal of Honor recipient
Thomas Jefferson | Thomas Edison | Thomas | Thomas Hardy | Thomas Mann | Thomas Aquinas | Clarence Thomas | Thomas Gainsborough | Dylan Thomas | Thomas Pynchon | St. Thomas | Saint Thomas, U.S. Virgin Islands | Thomas Carlyle | Thomas the Tank Engine | Thomas Moore | Thomas Cromwell | Thomas Becket | Thomas the Apostle | Thomas Merton | Thomas Tallis | Thomas Paine | Roy Thomas | Thomas Telford | Thomas More | Thomas Wentworth, 1st Earl of Strafford | Ryan Thomas | C. Thomas Howell | Thomas Kean | Thomas Gage | Thomas Eakins |