Richard Arthur Gadbois Jr. (June 18, 1932 – October 2, 1996) was a United States federal judge.
Born in Omaha, Nebraska, Gadbois received an A.B. from St. John's University in 1955 and a J.D. from Loyola Law School, Los Angeles, CA in 1958. He graduated from the University of Southern California Law School in 1960. He was a Deputy state attorney general of California from 1958 to 1959. He was in private practice in Los Angeles, California from 1960 to 1968. He was a Vice president, general counsel and secretary of Denny's, Inc., La Mirada, California from 1968 to 1971. He was a judge on the Municipal Court of California, City of Los Angeles from 1971 to 1972. He was a judge on the Superior Court of California, County of Los Angeles from 1972 to 1982.
On June 28, 1982, Gadbois was nominated by President Ronald Reagan to a seat on the United States District Court for the Central District of California vacated by Irving Hill. Gadbois was confirmed by the United States Senate on July 27, 1982, and received his commission on July 28, 1982. He assumed senior status on January 24, 1996, and served in that capacity until death later that year in Los Angeles, California.