Robert Gary Klausner (born 1941) is a United States federal judge.
Born in Los Angeles, California, Klausner received a B.A. from the University of Notre Dame in 1963, a B.S. from the University of Notre Dame in 1964, and a J.D. from Loyola Law School in 1967. He was in the United States Army from 1967 to 1969. He was a Deputy district attorney of District Attorney's Office of Los Angeles County, California from 1969 to 1974. He was a Court commissioner, Pasadena Municipal Court, California from 1974 to 1980. He was a judge on the Pasadena Municipal Court, California from 1980 to 1985. He was a judge on the Los Angeles Superior Court, California from 1985 to 2002.
Klausner was a federal judge on the United States District Court for the Central District of California. Klausner was nominated by President George W. Bush on July 18, 2002, to a seat vacated by William D. Keller. He was confirmed by the United States Senate on November 14, 2002, and received his commission on November 15, 2002.