Mary Barrett

Mary Barrett may refer to:

• Mary Dyer née Barrett (c. 1611–1660), colonial American Quaker martyr
• Mary Ellin Barrett (1926–2022), American writer
• Mary Adrian Barrett (1929–2015), American Catholic religious sister
• Mary Hall Barrett Adams (1816–1860), née Barrett, American book editor and letter writer
• Mary Ethel Williams Barrett (1913–1951), artist, art teacher, and the first director of the Wilmington Museum of Art

• Maria Barrett, American general
• Mario Barrett a.k.a. Mario (born 1986), American singer
• Maurie Barrett (1893–1981), Australian rules footballer