Mary Ramsey may refer to:

• Mary Ramsey (philanthropist) (died 1601), English philanthropist
• Mary Ramsey (musician) (born 1963), American singer-songwriter
• Mary Ramsey Wood (died 1908), American pioneer, born Mary Ramsey
• Mary Paton Ramsay (1885–?), Scottish academic, born Mary Ramsey
• Lady Mary Ramsey, born Mary Heathcote-Drummond, wife of Arthur Ramsay, 14th Earl of Dalhousie