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The Indian tribes dwelling in what was to become Illinois had communal codes of conduct and simply structured judicial systems.
Lake County's judicial history dates back to the 1830s.
Read about the early history of judicial courts in Illinois.
Illinois became a state in April 1818. Article IV of the new Constitution described the judicial system.
Article V of the Illinois Constitution of 1848 established a Supreme Court of 3 judges with 2 of the 3 constituting a quorum.
The Constitution of 1870 spelled out the new judicial system in Article VI.
Under the Judicial Article of 1964 the judicial power of Illinois was vested in a Supreme Court, and Appellate Court, and Circuit Courts.
Illinois has the distinct advantage of not only having one of the first truly unified court systems in the nation, but also having had the opportunity in the 1970 Constitution of refining and improving that system after a trial period.
View information about the Supreme Court, Appellate Court, and the Circuit Court serving the State of Illinois.
View a comprehensive timeline of the history of the judicial system in Illinois.