Lawrence L. Dugan (1930 – September 13, 1998) was an American labor union leader.
Born in Phoenix, Arizona, Dugan became a crane oiler in 1948 and joined the International Union of Operating Engineers (IUOE), in which his father was already active.
He served in various posts in his local union, including 25 years as its head.
In 1979, he moved to Washington, D.C., to become a vice-president of the union, and the assistant to its president, J. C.
He retired in 1990, due to poor health, and died eight years later.