Mary Baker may refer to: Mary Baker (painter) (fl. 1842–1856), English painter Bonnie Baker (baseball) (Mary Geraldine Baker, 1918–2003), American baseball player Mary Baker Eddy (1821–1910), born Mary Baker, founder of Christian Science Mary Landon Baker (1901–1961), American socialite and heiress famous for her romantic life Princess Caraboo (1791–1864), English impostor Mary E. Baker (1923–1995), African-American community activist Mary Baker McQuesten (1849–1934), born Mary Jane Baker, activist Mary Ann Baker (1831–1921), American composer and singer Mary Lou Baker (1914–1965), member of the Florida House of Representatives and women's rights activist