Thomas "Tommy" Armstrong (1848 – 1920), 19th century Geordie singer, songwriter
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Thomas H. Armstrong (1829–1891), American Lieutenant Governor of Minnesota
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Thomas E. Armstrong (born 1959), American Republican politician from Pennsylvania
Thomas Jefferson | Louis Armstrong | Thomas Edison | Thomas | Thomas Hardy | Thomas Mann | Lance Armstrong | Thomas Aquinas | Clarence Thomas | Thomas Gainsborough | Neil Armstrong | Dylan Thomas | Thomas Pynchon | St. Thomas | George Armstrong Custer | 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 |
Notable organisrts of Peterborough Cathedral have included Stanley Vann, Sir Malcolm Sargent and Thomas Armstrong.