John Francis Nangle (June 8, 1922 – August 24, 2008) was a United States federal judge.
Born in St. Louis, Missouri, Nangle received an A.A. from Harris Teachers College in 1941, a B.S. from the University of Missouri in 1943, and a J.D. from Washington University School of Law in 1948. He was in the United States Army Sergeant from 1943 to 1946. He was in the United States Army Reserve Captain, JAG Corps from 1946 to 1971. He was in private practice in St. Louis and Clayton, Missouri from 1948 to 1973. He was a City attorney of Brentwood, Missouri from 1953 to 1963. He was a Special legal advisor, Government of St. Louis County, Missouri from 1963 to 1973.
Nangle was a federal judge on the United States District Court for the Eastern District of Missouri. Nangle was nominated by President Richard Nixon on June 13, 1973, to a seat vacated by William H. Webster. He was confirmed by the United States Senate on July 13, 1973, and received his commission on July 18, 1973. He served as chief judge from 1983 to 1990. He assumed senior status on May 10, 1990. Nangle served in that capacity until his death, in Savannah, Georgia.