Mary Lord may refer to:

• Mary Dimmick Harrison (1858–1948), born Mary Scott Lord, second wife of U.S. president Benjamin Harrison
• Mary Lord (correspondent) (born c. 1954), correspondent for U.S. News & World Report
• Mary Lou Lord (born 1965), indie folk musician
• Mary Pillsbury Lord (1904–1978), U.S. delegate to the United Nations General Assembly

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