Born January 31, 1920, in Saint Johns, Arizona, where he attended elementary and high school. Attended the University of Arizona, Tucson, 1938-1940.
Joined the Air Force during World Water II and served in Italy as an enlisted B24 gunner with the Fifteenth Air Force. He flew fifty missions over Western Europe and received the Air Medal with three Oak Leaf Clusters.
Returned to the University of Arizona in 1946 and played guard on the first Arizona basketball team to represent the state in a national invitational tournament at Madison Square Garden. He married Erma Lee Webb in 1947, and they eventually had a family of six children. In 1948, he received a law degree, was admitted to the Arizona bar, and commenced the practice of law in Tucson.
Established the law firm of Udall and Udall with his brother Morris K. Udall. Stewart was vice-chairman for the Democratic Party’s central committee. He also served as treasurer of the Pima County Legal Aid Society, president of the Amphitheater School Board, and trustee of School District 16.
Elected to the U.S. House of Representatives as a Democrat in District 2 from Arizona.
Appointed to two major committees: Interior and Insular Affairs, and Education and Labor, where he worked closely with John F. Kennedy on labor reform. Stewart was also a member of the Joint Committee on Navajo-Hopi Indian Administration.
Worked on legislation which created the Glen Canyon Dam and fought to locate the town of Page on the so called “Arizona Side” of the Dam.
Successfully campaigned to adopt new rules for the Education and Labor Committee. Stewart modeled these rules on reforms adopted by the Interior and Insular Affairs Committee in the early 1950s.
Began organizing orientation sessions for freshman congressmen.
Secretary of the Interior by John F. Kennedy (served 1961-1969). As Secretary of the Interior during the Kennedy and Johnson Administrations, Stewart Udall oversaw the addition of four parks, six national monuments, eight seashores and lakeshores, nine recreation areas, 20 historic sites, and 56 wildlife refuges to the National Park system.