Harold Barnett McSween (born July 19, 1926) was a Democratic member of the United States House of Representatives from Louisiana. He represented Louisiana’s 8th Congressional District and served two terms in Congress. McSween first took office on January 7, 1959, and his service concluded on January 3, 1963, marking a four-year tenure at the federal level.

During his time in the House, McSween served as a Representative for Louisiana, identified in congressional records under the bioguide ID M000605. He was part of the Democratic Party and held office as a historical member of Congress from the state, though specific committee assignments or additional official roles are not listed in the available record. After leaving office in 1963, he is regarded as a former member of Congress for Louisiana’s 8th District.