William J. Hibbler (born August 7, 1946) is a United States federal judge.
Born in Kennedy, Alabama, Hibbler received a B.S. from the University of Illinois at Chicago in 1969 and a J.D. from DePaul University in 1973. He was an Assistant state's attorney of Cook County State's Attorney Office from 1973 to 1977. He was in private practice in Chicago, IL from 1977 to 1981. He was an Assistant state's attorney of Cook County State's Attorney Office from 1981 to 1986. He was an Associate judge, Cook County Circuit Court from 1986 to 1999. He was an Adjunct professor, Chicago/Kent College of Law from 1989 to 1999.
Hibbler was a federal judge on the United States District Court for the Northern District of Illinois. Hibbler was nominated by President Bill Clinton on January 26, 1999, to a seat vacated by James H. Alesia. He was confirmed by the United States Senate on April 15, 1999, and received his commission on April 22, 1999.