Adam Benjamin, Jr. (1935 in Gary, Indiana - 1982) was a US representative from Indiana. He served in Congress from 1977 until his death. Prior to his tenure, Benjamin, a Democrat, served in the Indiana Senate from 1971 to 1977 and the Indiana House of Representatives from 1967 to 1971.

Benjamin served in both the Marine Corps (as a corporal in the Korean War) and the Army, and received degrees from the Kemper Military School (Missouri) and the US Military Academy at West Point, New York.

In 1963, Benjamin entered public service as Gary, Indiana’s zoning administrator. Within three years, he also earned a law degree from Valparaiso University and was admitted to the Indiana Bar.

While in the Congress, Benjamin sat on the House Appropriations Committee, and served as chairman of the House Appropriations Subcommittee on Transportation. He also chaired the executive committee of the Congressional Steel Caucus and worked to establish the Calumet Forum, with representatives of labor, industry, banking, publishing, education, politics, transportation, and the religious community, seeking to promote the economic resurgence and development of the Calumet Region, Indiana.