Mary Gregory (disambiguation)

Mary Gregory (1856–1908) was an American artist specializing in glass painting.

Mary Gregory may also refer to:


 * Mary Rogers Gregory (1846–1919), American portrait artist
 * Sister Mary Gregory (1928–2013), American author, educator and theologian, also known as Jeanne Knoerle
 * Elizabeth Fitzhenry (before 1735–c. 1790), Irish actress also credited as Mary Gregory
 * E. Mary Gregory, American plaintiff in 1885 Supreme Court case of Gregory v. Hartley