Mary Ann or Maryann or Mary Anne is a feminine given name, a combination of the names Mary and Anne. It may refer to:
People
Mary Ann
Mary Ann Acevedo (born 1987), Puerto Rican singer and songwriter
Mary Ann Akers, American gossip columnist, and former blogger and reporter
Mary Ann Aldersey (1797–1868), English-born Christian missionary in China
Mary Ann Aldham (1858–1940), English militant suffragette
Mary Ann Almager (born 1968), American former professional boxer
Mary Ann Angell (1803–1882), American second wife of Brigham Young
Mary Ann Arras, former name of Maray Ayres, American actress
Mary Ann Arty (1926–2000), American politician
Mary Ann Aspinwall Owens (1928–2005), American advocate of thematically collecting postage stamps
Mary Ann Augustin (born 1954), Malaysian-born Australian food chemist and dairy scientist
Mary Ann Baxter (1801–1884), Scottish philanthropist
Mary Ann Beavis (born 1955), Canadian professor emerita of religion
Mary Ann Bevan (1874–1933), English nurse
Mary Ann Bibby (c. 1832–1910), New Zealand storekeeper
Mary Ann Bickerdyke (1817–1901), American hospital administrator during the American Civil War, lawyer, and advocate for veterans
Mary Ann Booth (1843–1922), American microscopist
Mary Ann Britland (1847–1886), English serial killer
Mary Ann Buckles, American video game researcher
Mary Ann Bugg (1834–1905), Worimi bushranger
Mary Ann Buxton (c. 1795–1888), English-born New Zealand teacher and businesswoman
Mary Ann Campana (1913–2009), Italian-born American aviator and businesswoman
Mary Ann Carson, American former politician
Mary Ann Caws (born 1933), American author, translator, art historian, and literary critic
Mary Ann Childers, American media consultant and former newscaster
Mary Ann Coady Weinand (1959–2007), American psychiatrist
Mary Ann Colclough (1836–1885), New Zealand feminist and social reformer
Mary Ann Conklin (c. 1821–1873), American brothel madam
Mary Ann Cooke (1784–1868), British missionary
Mary Ann Criddle (1805–1880), English painter
Mary Ann Croswell (?–1830), English silversmith
Mary Ann Cunningham (1841–1930), Canadian temperance activist
Mary Ann Dailey (born 1948), American former politician
Mary Ann Davenport (1759–1843), British Shakespearean actress
Mary Ann DeWeese (1913–1993), American sportswear designer
Mary Ann Doane (born 1952), American professor of film and media
Mary Ann Dolling Sanders, birth name of Ann Bridge (1889–1974), English author and mountain climber
Mary Ann DuChai (born 1939), American sprint canoer
Mary Ann Duff (1794–1857), English tragedienne
Mary-Ann Dunjwa, South African politician
Mary Ann Dunwell (born 1954), American politician
Mary Ann Dyer Goodnight (1839–1926), American cattlewoman and rancher
Mary Ann Eaverly, American archaeologist, classical scholar, and professor
Mary-Ann Eisel (born 1946), American former tennis player
Mary Ann Eliza Agnew (1857–1940), English-born Australian kindergarten teacher and advocate
Mary Ann Elizabeth Stephansen (1872–1961), Norwegian mathematician and educator
Mary Ann Esposito (born 1942), American chef, cookbook writer, and television host
Mary Ann Evans, known by her pen name George Eliot (1819–1880), English author and journalist
Mary Ann Feldman (1933–2019), American music critic
Mary Ann Ford, birth name of Talma (1861–1944), English magician
Mary Ann Ganser, American member of girl group The Shangri-Las
Mary Ann Gibbon, English long-term mistress of Charles Howard, 11th Duke of Norfolk
Mary Ann Gilbert (1776–1845), English agronomist
Mary Ann Glendon (born 1938), American diplomat, professor, legal scholar, anti-abortion activist, lawyer, and philosopher
Mary Ann Glynn, American academic
Mary Ann Gomes (born 1989), Indian chess player
Mary Ann Greaves (1834–1897), New Zealand prostitute and criminal
Mary Ann Grindall Hume, British wife of Allan Octavian Hume