Clarence Dickinson "Doc" Long, Jr. (December 11, 1908 – September 18, 1994) was a Democratic U.S.

"[2] He also served in the United States Navy during World War II.

He was a former member of the United States Council of Economic Advisers to the President (1953–54 and 1956–57) and in the 1930s was a professor of economics at Wesleyan University and later Johns Hopkins University (1946–1963).

[5] Long became Chairman of the subcommittee on Foreign Operations of the House Appropriations Committee.

Long was defeated for re-election by Republican Helen Delich Bentley in 1984.