Mary Gray

Mary Gray may refer to:
 * Bessy Bell and Mary Gray, ballad subjects
 * Mary Augusta Dix Gray (1810–1881), American missionary to Nez Perce people in the Oregon Territory
 * Mary Gray (socialist) (1854–1941), British socialist activist and founder of the first Socialist Sunday School
 * Mary L. Gray, American anthropologist and author
 * Mary Tenney Gray (1833–1904), American editorial writer, philanthropist, and suffragette
 * Mary W. Gray (born 1938), American mathematician

Fictional characters

 * Mary Gray, in the 1926 US silent comedy film The American Venus, played by Esther Ralston