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