Mary Pillsbury Lord (November 14, 1904 – July 21, 1978) was an American civic worker and officer in several charitable organizations, as well as serving as a U.S. delegate to the United Nations General Assembly.

Lord became a volunteer case work for the Charity Organization Society in New York City.

During World War II she served as Assistant Regional Director of the Office of Civilian Defense and in 1944 was appointed chairman of the National Civilian Advisory Committee of the Women's Army Corps WAC.

[5] In 1953 Lord was appointed by President Dwight D. Eisenhower to succeed Eleanor Roosevelt as the U.S. representative to the United Nations Human Rights Commission.

Mary, along with her sister, Katherine Pillsbury McKee, was a survivor of the sinking of the Ward Line steam ship SS Mohawk, which occurred on January 24, 1935.