John Virgil Singleton Jr. (March 20, 1918 – March 20, 2015) was a United States federal judge. Born in Kaufman, Texas, Singleton received a B.A. from the University of Texas in 1942. While at UT, he was a member of the Texas Cowboys service organization. He then served in the United States Navy Lieutenant Commander from 1942 to 1946, working in the Veterans Administration and graduated from the United States Judge Advocate School in 1948. He was in private practice in Houston, Texas from 1946 to 1966.
On June 28, 1966, President Lyndon B. Johnson nominated Singleton to a new seat on the United States District Court for the Southern District of Texas created by 80 Stat. 75. He was confirmed by the United States Senate on July 22, 1966, and received his commission the same day. He served as chief judge from 1979–1988, and assumed senior status on April 1, 1988. He retired on June 1, 1992. As of 2012 he lives in the Lakes of Parkway community in western Houston.