Lloyd Llewellyn Black (March 15, 1889 – August 23, 1950) was a United States federal judge.
Born in Leavenworth, Kansas, Black received an A.B. from the University of Washington in 1910 and an LL.B. from the University of Washington School of Law in 1912. He was in private practice in Everett, Washington from 1913 to 1932. He was in the United States Army in 1918. He was a Prosecuting attorney of Snohomish County, Washington from 1917 to 1919. He was an Attorney, U.S. Army, Port of Everett, Washington from 1923 to 1936. He was a Special counsel, City of Everett, Washington in 1916 and from 1920 to 1922. He was a judge on the Superior Court, Snohomish and Island Counties, Washington from 1936 to 1939.
Black was a federal judge on the United States District Court for the Western District of Washington. Black was nominated by President Franklin D. Roosevelt on August 2, 1939, to a new seat created by 52 Stat. 584. He was confirmed by the United States Senate on August 4, 1939, and received his commission on August 11, 1939. Black served in that capacity until August 23, 1950, due to his death.
Black was a federal judge on the United States District Court for the Eastern District of Washington. He was reassigned on January 20, 1940; Black served in that capacity until August 23, 1950, due to his death.