William Joshua Allen (June 9, 1829 – January 26, 1901), frequently known as W. J. Allen, was an American lawyer, jurist, and politician. He served as a United States representative from Illinois and a United States district judge of the United States District Court for the Southern District of Illinois.

William Joshua Allen
Illinois Southern District Court
Born 1829 in Wilson County, TN
Died 1901 in Hot Springs, AR
FJC ID: 29
- Gender
- Male
- Race
- White
Prior employment
- Private practice, Springfield, Illinois1886–1887
- Private practice, Carbondale, Illinois1874–1886
- Private practice, Cairo, Illinois1865–1874
- U.S. representative from Illinois1862–1865
- Private practice, Marion, Illinois1853–1862
- Illinois Circuit Court, Twenty-Sixth Judicial CircuitJudge · 1859–1861
U.S. attorney for the Southern District of Illinois1855–1859- IllinoisState representative · 1855
- Twenty-Sixth Judicial Circuit, IllinoisProsecuting attorney · 1853–1854
- Private practice, Metropolis, Illinois1849–1853
- Illinois state legislatureEnrolling and engrossing clerk · 1849, 1851
Appointments
1888–1901 · Appointed by Grover Cleveland (Democratic)Term ended: Death
Education
- University of Louisville Law Department (now Louis D. Brandeis School of Law)LL.B. · 1848