Illinois
Signature caps, a 90-day window, and a state where validity is decided by objection rather than review.
Illinois is unlike any other state in one respect: nobody checks your signatures at filing. Petitions are accepted on their face and deemed valid unless an objection is filed. Validity is tested adversarially, by opposing counsel and forensic examiners, with no opportunity to fix anything.
Signature Requirements
| Office / Measure | Requirement |
|---|---|
| Statewide / U.S. Senate, established party | Not less than 5,000 nor more than 10,000 |
| U.S. House, established party | 0.5% of the party's qualified primary electors in the district |
| State Senate, established party | 1,000 to 3,000 |
| State Representative, established party | 500 to 1,500 |
| Statewide independent | 1% of the last statewide general election vote, or 25,000, whichever is less |
| District office independent | Not less than 5% nor more than 8% of the district's last general election vote |
| New political party, statewide | 1% of the last statewide general vote, or 25,000, whichever is less |
| Initiated constitutional amendment | 328,371 — 8% of the last gubernatorial vote |
No verification, no cure, and a five-day objection window
Illinois does not verify signatures administratively. Papers are valid unless objected to. An objector's petition must be filed within five business days after the filing deadline, after which an electoral board convenes and conducts a records examination — a line-by-line comparison against voter registration records and stored signature images, often with forensic handwriting experts. The burden is on the objector, but there is no cure: once filed, petitions cannot be withdrawn, altered, or added to.
The 90-day circulation cap
Petitions may not be circulated more than 90 days before the last day for filing. This is the tightest structural constraint in Illinois and means established-party petitioning happens in late summer, while independent petitioning runs February through May.
Signature maximums
Illinois is one of very few states with statutory ceilings — 10,000 for U.S. Senate, 3,000 for state senate, 8% for district independents. Filing too many signatures is itself an objection ground, so the usual strategy of over-collecting for insurance does not work here.
Notarization on every sheet
Every petition sheet carries a circulator statement that must be sworn before a notary. The candidate's Statement of Candidacy must also be notarized and attached at the front. Signatures of signers, circulator, and notary must all be original — no photocopies — and sheets must be original, uniform in size, numbered consecutively, and bound at one edge.
Circulator rules are permissive
A circulator must be at least 18 and a U.S. citizen, but need not be a registered voter and need not live in the district, county, or even the state. Conduct restrictions are strict, though: a circulator may not work for more than one political party, may not circulate for independent and new-party candidates simultaneously, and may not mix established-party with independent work in the same cycle.
Ballot Measures in Illinois
Illinois has an extremely narrow citizen initiative. There is no initiated statute and no statewide veto referendum. The only citizen-initiated statewide measure is a constitutional amendment, and it may amend only Article IV — the Legislative Article — and only as to structural and procedural subjects. Courts have read that narrowly, which is why most Illinois initiative drives end before circulation begins. The threshold is 8% of the last gubernatorial vote, with an unusually long window: signatures may be collected up to 24 months before the election, filed at least six months prior.
What Trips Campaigns Up in Illinois
We've Worked This Ground
Illinois Ballot Access FAQ
How are petition signatures verified in Illinois?
They are not, at least not automatically. Illinois conducts no administrative signature check. Petitions are deemed valid unless someone files an objection within five business days of the filing deadline, which triggers an electoral board records examination.
Is there a maximum number of signatures in Illinois?
Yes. Illinois sets statutory ceilings as well as floors — for example, no more than 10,000 for U.S. Senate and no more than 3,000 for state senate. Filing above the maximum is grounds for objection.
How long is the Illinois circulation period?
90 days. Petitions may not be circulated more than 90 days before the last day for filing.
Can out-of-state circulators work in Illinois?
Yes. An Illinois circulator must be at least 18 and a U.S. citizen, but need not be a registered voter or a resident of the district, county, or state.
Running a Campaign in This State?
Signature requirements are the easy part. Hitting them on deadline is the job.