Mary Clark

Mary Clark may refer to:


 * Mary Bateman Clark, American woman, born into slavery, who won her freedom
 * Mary Clark (architect) (born 1936), Canadian architect
 * Mary Clark-Glass (active since 1974), academic, medical administrator and former politician in Northern Ireland
 * Mary Clark (printer) (active 1677–1696), London printer and publisher
 * Mary Clark Thompson (1835–1923), philanthropist and wife of banker Frederick Ferris Thompson
 * Mary E. Clark (1927–2019), American biologist
 * Mary Elizabeth Clark (born 1938), main mover of the AIDS Education and Global Information System
 * Mary Ellen Clark (born 1962), American diver
 * Mary Higgins Clark (1927–2020), American author
 * Mary Jane Clark (born 1954), American author
 * Mary Kitson Clark (1905–2005), British archaeologist
 * Mary Margaret Clark (1925–2003), American medical anthropologist
 * Mary T. Clark (1913–2014), American historian of philosophy