Thomas Ashby

Thomas Ashby may refer to:
 * Thomas Ashby (archaeologist) (1874–1931), British archaeologist
 * Thomas Ashby (doctor) (1848–1916), American doctor, academic, writer, and politician
 * Tom Ashby (1895–1957), mayor of Auckland, New Zealand
 * Thomas Ashby (MP) (fl. 1414), member of parliament for Leicestershire
 * Thomas Ashby (martyr) (died 1544), English religious dissident