Mary Margaret is a feminine given name. Notable people with the name include:
Mary Margaret Busk (1779–1863), English writer and translator Mary Margaret Conway, American political scientist Mary Margaret Francis (1924–2000), British author Mary Margaret Funk, American writer and advocate of inter-religious dialogue Mary Margaret Haugen (born 1941), American politician Mary Margaret Heaton (1836–1883), English art historian Mary-Margaret Humes (born 1954), American actress and beauty pageant titleholder Mary Margaret Kaye (1908–2004), British writer Mary Margaret McBride (1899–1976), American radio interview host and writer Mary Margaret McCabe (born 1948), English emerita professor of ancient philosophy Mary Margaret McKeown (born 1951), American circuit judge Mary-Margaret McMahon (born 1966), Canadian politician Mary Margaret Milner, birth name of Margaret Richardson (lawyer) (1943–2021), American tax lawyer Mary Margaret Oliver (born 1948), American politician Mary Margaret O'Hara (born late 1950s), Canadian singer-songwriter, actress, and composer Mary Margaret O'Reilly (1865–1949), American civil servant Mary Margaret Truman (1924–2008), American classical soprano, actress, journalist, radio- and television personality, writer, and socialite; only child of Harry S. Truman Mary Margaret Whipple (born 1940), American former politician