Luther Merritt Swygert (February 5, 1905 – March 16, 1988) was a United States federal judge.
Born in Miami County, Ohio, Swygert received an LL.B. from Notre Dame Law School in 1927. He was in private practice in Indiana from 1928 to 1931. He was a Deputy prosecuting attorney of Lake County, Indiana from 1931 to 1933. He was an assistant U.S. Attorney of the Northern District of Indiana from 1934 to 1943.
Swygert was a federal judge on the United States District Court for the Northern District of Indiana. Swygert was nominated by President Franklin D. Roosevelt on September 29, 1943, to a seat vacated by Thomas W. Slick. He was confirmed by the United States Senate on October 14, 1943, and received his commission on October 16, 1943. He served as chief judge from 1954-1961. Swygert served in that capacity until October 10, 1961, due to appointment to another judicial position.
Swygert was a federal judge on the United States Court of Appeals for the Seventh Circuit. Swygert was nominated by President John F. Kennedy on September 18, 1961, to a new seat created by 75 Stat. 80. He was confirmed by the United States Senate on September 23, 1961, and received his commission on September 29, 1961. He served as chief judge from 1970-1975. He assumed senior status on July 1, 1981. Swygert served in that capacity until March 16, 1988, due to his death.