Mary Thomas

Mary Thomas may refer to:


 * Joyce Arleen (1931– 2023), American actress sometimes credited as Mary Thomas
 * Mary-Anne Thomas (born 1963), Australian politician
 * Mary Beatrice Thomas (1873–1954), British lecturer in chemistry
 * Mary Bentley Thomas (1845–1923), American suffragist
 * Mary F. Thomas (1816–1888), American women's rights leader
 * Mary Raine (1877–1960), Australian businesswoman and philanthropist, also known as Mary Thomas during her first marriage
 * Mary Sternberg Thomas (1866–1951), American lawyer in Colorado, U.S.
 * Mary Thomas (artist) (born 1944), Aboriginal Australian artist at Warmun Art Centre, Turkey Creek, Western Australia
 * Mary Thomas (labor leader) (c. 1848–1905), one of the leaders of the 1878 "Fireburn" labor riot on St. Croix, West Indies
 * Mary Thomas (poet) (1787–1875), South Australian diarist, poet, and early settler
 * Mary Thomas (politician) (1944–2014), American Pima politician and activist
 * Mary Thomas (soprano) (1932–1997), Welsh soprano