Illinois Supreme Court and Appellate Court opinions that decide where claims against the State must be heard — the Court of Claims' exclusive jurisdiction (705 ILCS 505/8), sovereign immunity (745 ILCS 5/1), and the officer-suit exception — plus the federal cases that set the outer boundary (Eleventh Amendment, prospective vs. retroactive relief). This is a selected list, not a complete survey of the case law. Holdings below are editorial summaries, not legal advice. Full opinion texts via the linked public-domain pages.
Illinois Supreme Court
Holding: A suit to enjoin a state officer from acting in excess of delegated authority is not a claim against the State and may proceed in circuit court; it does not fall within the Court of Claims' exclusive jurisdiction.
officer-suit exceptionsovereign immunityprospective relief
Illinois Supreme Court
Holding: Whether an action is against the State depends on the issues and relief sought, not the named parties; where the State is the party vitally interested, the claim belongs in the Court of Claims, which has no equitable jurisdiction.
party vitally interestedexclusive jurisdictionequitable jurisdiction
Illinois Supreme Court
Holding: The Court of Claims Act does not violate the separation-of-powers provision of the Illinois Constitution.
constitutionalityseparation of powers
Illinois Supreme Court
Holding: A tenured professor's damages action against a state university board is a present money claim against an arm of the State and must be brought in the Court of Claims; only suits to enjoin future ultra vires action escape immunity.
present claimarm of the stateexclusive jurisdiction
Illinois Supreme Court
Holding: A graduate student's suit to halt a university disciplinary investigation alleged to violate governing rules states a prospective ultra vires claim that may proceed in circuit court under the officer-suit exception.
officer-suit exceptionprospective reliefdue process
Illinois Supreme Court
Holding: A declaratory action whose substance is recovery of money paid to the State is a money-judgment claim barred by sovereign immunity; the officer-suit exception is confined to prospective relief and does not reach it.
officer-suit exceptionmoney judgmentestate tax
Illinois Supreme Court
Holding: An attorney's lien against settlement proceeds paid by private defendants is a claim against a fund, not the state treasury, so the circuit court — not the Court of Claims — is the proper forum; the Court of Claims receives and resolves claims rather than adjudicating cases.
fund vs treasurycircuit-court forumnature of the court
Illinois Appellate Court, First District
Holding: Certiorari in circuit court is available to challenge a due process violation in a Court of Claims proceeding (adequate notice and an opportunity to be heard), but not to review whether the Court of Claims decided the merits correctly; legal error alone is not a due process violation.
certiorari reviewdue processlimitations
Illinois Appellate Court, Fifth District
Holding: County sheriffs' suit over the State's failure to fund a statutory stipend was not barred by sovereign immunity at the pleading stage; the Fifth District reversed the dismissal and remanded, treating the claim as one to compel compliance with the law rather than a contract or tort claim against the State.
officer-suit exceptionmandamusdeclaratory relief
U.S. Court of Appeals, Seventh Circuit
Holding: The Illinois Court of Claims lacks jurisdiction over claims based on federal statutes or constitutions, so a prisoner's prior Court of Claims damages action did not preclude his federal section 1983 injunctive suit (defendants conceded no res judicata bar).
federal claimsres judicatalimits of COC jurisdiction
U.S. Court of Appeals, Seventh Circuit
Holding: Illinois has not waived its Eleventh Amendment sovereign immunity; waiver requires a state statute, constitutional provision, or act of an official with specific waiver authority.
Eleventh Amendmentwaiversovereign immunity
U.S. Supreme Court
Holding: A State waives Eleventh Amendment immunity only by the most express language or overwhelming implication; consent to suit in its own courts is not consent to federal suit.
Eleventh Amendmentwaiver standard
U.S. Supreme Court
Holding: Federal courts may order prospective compliance with federal law against state officers (Ex parte Young) but may not award retroactive money damages from the state treasury.
prospective vs retroactive reliefEx parte Young
Compiled 2026-09-27 · 13 cases · Illinois Supreme Court and Appellate Court decisions construing Court of Claims jurisdiction and sovereign immunity, plus the federal cases that set its outer boundary. Full opinion texts via linked OpenJurist pages (public domain); holdings above are editorial summaries, not legal advice.