No action shall be brought by quo warranto, or otherwise, questioning the legality of the organization of any county, city, village, incorporated town, township, school district, park district, road district, drainage district, sanitary district, authority or any other municipal corporation or political subdivision in the State of Illinois after such municipal corporation or political subdivision has been in de facto existence for a period of 3 years.
18-104.Limitation.
Article XVIII. Quo Warranto · Not amended since adoption on record · Last verified July 20, 2026
In one sentenceBars any quo warranto challenge to the legality of a municipal corporation's or political subdivision's organization once it has existed de facto for 3 years.
Full Text of 735 ILCS 5/18-104
Plain-English Summary
This section is a statute of repose for a specific kind of quo warranto challenge: attacks on whether a county, city, village, incorporated town, township, school district, park district, road district, drainage district, sanitary district, authority, or other municipal corporation or political subdivision was properly organized in the first place.
Once such a body has existed de facto — functioning in fact as that kind of entity — for 3 years, no action, whether by quo warranto or otherwise, may question the legality of its organization. The rule gives long-settled local governments and districts protection against belated challenges to their basic existence, so residents, officials, and anyone dealing with the entity can rely on its standing after that window closes.
Notably, the bar reaches beyond quo warranto itself: the statute says the challenge can't come “by quo warranto, or otherwise,” closing off other procedural routes to the same attack once the 3-year de facto period has run.
Frequently Asked Questions
How long can a local government's organization be challenged by quo warranto in Illinois?
Only within 3 years of the entity coming into de facto existence; after that, Section 18-104 bars the challenge.
What kinds of entities does this 3-year limitation cover?
Counties, cities, villages, incorporated towns, townships, school districts, park districts, road districts, drainage districts, sanitary districts, authorities, and other municipal corporations or political subdivisions.
Does the 3-year bar apply only to quo warranto actions?
No. The section bars the challenge whether brought "by quo warranto, or otherwise," closing off other procedural avenues to the same attack.
What does "de facto existence" mean in this section?
It refers to the entity functioning in fact as the kind of body claimed, regardless of whether its original organization was technically proper.
Why does Illinois limit challenges to a local government's organization?
To protect long-standing local governments and districts from belated attacks on their basic existence, giving residents and officials certainty after the entity has operated for years.
Amendment History
(Source: P.A. 82-280.)
Source & verification. Section text and amendment history are
reproduced verbatim from the Illinois Compiled Statutes, published by the
Illinois Compiled Statutes, Illinois General Assembly / Legislative Reference Bureau. Last verified July 20, 2026.
· Official source
Also known as: quo warranto statute of limitations illinoisde facto municipal corporation illinoischallenging school district organization illinois3 year quo warranto bar