Nat LaCour (February 11, 1938 - October 10, 2020) was an American labor union leader and teacher.
In 1972 he engineered along with Cheryl Epling, president of the rival and mostly White Orleans Educators' Association (OEA) and Bob Crowley, the Executive Director of the NEA affiliate in New Orleans, a merger with the National Education Association local to form United Teachers of New Orleans (UTNO).
In 1974, UTNO became the first teachers' union in the Deep South to win a contract without the protection of a state public employee collective bargaining law.
LaCour is a founding member of the National Board for Professional Teaching Standards, and serves on the board of directors of the Albert Shanker Institute, National Democratic Institute, the A. Philip Randolph Institute and the Coalition of Black Trade Unionists.
On February 11, 2008, LaCour announced he would retire as Secretary-Treasurer of the AFT at its regularly scheduled biennial convention in Chicago in July 2008.