Others
- Thomas Lewis (activist) (1940–2007), artist and activist
- Thomas Lewis (unionist) (1866–1939), president of the United Mine Workers of America
- Thomas Lewis (Virginia) (1718–1790), American surveyor, Virginia pioneer
- Thomas Lewis (cardiologist) (1881–1945), British surgeon and cardiologist
- Thomas Lewis (industrialist) (died 1764), cofounder of the Dowlais Ironworks in 1759
- Sir Thomas Frankland Lewis, 1st Baronet (1780–1855), British Poor Law Commissioner
- Thomas Christopher Lewis (1833–1915), British organ-builder, see St Paul's Cathedral, Melbourne
- Thomas Lewis (aviator) (1894–1961), World War I flying ace
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