Marion Tully Dimick (May 4, 1904 – June 2, 1981), sometimes known as Teena Dimick, was an American philanthropist and arts patron, based in Washington, D.C. She funded archaeological work in Egypt, Central America, and the United States.

[6] Dimick volunteered with the American Red Cross during World War II.

[7] She was vice-president on the board of the National Symphony, and held board appointments at the Potomac School, the Washington Opera Society, National Savings and Trust Company, and the Washington Home for Incurables.

[15] She also donated funds to the University of Michigan, for archaeological work in the Great Lakes region.

Her second husband was petroleum engineer and archaeologist John M. Dimick; they married in June 1951.