William Thomas Hart | |
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| Senior Judge of the United States District Court for the Northern District of Illinois | |
| In office June 1, 1996 – January 17, 2023 | |
| Judge of the United States District Court for the Northern District of Illinois | |
| In office April 21, 1982 – June 1, 1996 | |
| Appointed by | Ronald Reagan |
| Preceded by | John Powers Crowley |
| Succeeded by | Rebecca R. Pallmeyer |
| Personal details | |
| Born | February 4, 1929 Joliet, Illinois, U.S. |
| Died | January 17, 2023 (aged 93) Chicago, Illinois, U.S. |
| Education | Loyola University Chicago (JD) |
| Military service | |
| Allegiance |  United States |
| Branch/service |  United States Army |
| Years of service | 1951–1953 |
William Thomas Hart (February 4, 1929 – January 17, 2023) was a United States district judge of the United States District Court for the Northern District of Illinois.