The Supreme Court of Illinois is the state supreme court, the highest court of the judiciary of Illinois. The court's authority is granted in Article VI of the current Illinois Constitution, which provides for seven justices elected from the five appellate judicial districts of the state: three justices from the First District and one from each of the other four districts. Absent mid-term vacancy, each justice is elected for a term of ten years, which may be renewed and the chief justice is elected by the court from its members for a three-year term.

The Illinois General Assembly is the legislature of the U.S. state of Illinois. It has two chambers, the Illinois House of Representatives and the Illinois Senate. The General Assembly was created by the first state constitution adopted in 1818. As of 2023, the current General Assembly is the 103rd; the term of an assembly lasts two years.