Heber Blankenhorn (March 26, 1884 – January 1, 1956) was an American journalist, psychological warfare innovator, and union activist who served on the National Labor Relations Board.

In 1921, he also served as acting publicity director for the Amalgamated Clothing Workers' Union, where he helped establish the New York Leader.

[1][2] By the early 1920s the Socialist Party was in severe membership decline and funding of the New York Call became correspondingly tenuous.

He went on to serve as industrial economist to chairmen of the National Labor Relations Board and the La Follette Committee for its hearings on the Ford Motor Company.

[1][2] He returned to service for the U.S. Army during World War II (1942–1946) on a psychological warfare team and reached the rank of colonel.

[1][2] In the 1950s, he returned to journalism, based in Europe on staff to Labor magazine, then retired to Alexandria, Virginia, to write his memoirs.

[3] In 2015, he received posthumous recognition from U.S. Army's John F. Kennedy Special Warfare Center and School as the "original Silver Knight" of the PSYOP Regiment.