Illinois prairie farmland with a red barn and the Chicago skyline on the horizon
ILLINOIS GUIDE

Life in Illinois comes
with its own rules. Know what comes next.

From stacking homestead exemptions and township assessors to the senior freeze, tornado season, and starting a business, CountyOffices gives you clear Illinois-specific guidance for the things that matter.

Reviewed against official Illinois government sources • Updated as laws and requirements change

What brings you here today?

I own a home in Illinois

Homestead exemptions, property taxes, assessments, and deeds.

I'm buying or selling property

Closings, title searches, transfer taxes, recording, and property records.

I'm preparing for tornado season

Safe rooms, weather alerts, insurance documents, and county resources.

Someone passed away

Probate, wills, estates, the state estate tax, and filing steps.

I'm getting married or divorced

Marriage licenses, divorce filing, name changes, and official records.

I'm caring for an aging parent

Senior exemptions, the freeze, benefits, and estate planning information.

I need an official record

Birth, death, marriage, court, property, and business records.

I'm starting or running a business

Licenses, permits, EIN, sales tax, and local requirements.

How-To Guides for Illinois

Illinois works differently. Here's what to know.

Townships Still Matter

In much of Illinois, township assessors and road districts handle work counties do elsewhere.

Exemptions Stack Up

The general homestead, senior, and senior freeze exemptions can combine to cut your bill.

Cook County Plays by Its Own Rules

The state's biggest county classifies and assesses property differently than the rest.

PTELL Tax Caps

In many counties, a limitation law caps how fast most taxing districts can raise levies.

Three Different Clerks

The County Clerk, Circuit Clerk, and Recorder each hold different pieces of your paperwork.

Illinois Has Its Own Estate Tax

Larger estates may owe a state estate tax in addition to federal rules.

The questions Illinois residents actually ask

See more common questions →

Not sure where to start?

Describe your situation and we'll point you in the right direction.

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IMPORTANT IN ILLINOIS

Important Deadlines in Illinois

Illinois's property tax cycle runs on a genuinely delayed timeline: your bill in a given year is based on the prior year's assessment, so tax bills mailed in May are typically for the year-earlier valuation.

Assessment Appeals in Illinois

If you disagree with your property's assessed value, Illinois gives you exactly 30 days (30 business days in counties over 3 million population, effectively Cook County) from the date your county's assessment list is published in the local newspaper - a genuinely firm, no-extension deadline that applies even if you personally never received individual notice.

Public Records Access in Illinois

The Illinois Freedom of Information Act (FOIA) presumes that records held by state and local government agencies are open to public inspection, and like most states' open-records laws, you generally don't need to explain your reason for a request or demonstrate a personal interest in the records.

Storm & Winter Help in Illinois

Illinois faces genuine tornado risk with peak season running spring through early summer, plus real winter hazards across the state once cold weather arrives - heavy snow, ice storms, and dangerous wind chill, particularly in northern Illinois and the Chicago area.

New to Illinois?

As a new Illinois resident, check with the Illinois Secretary of State for the current specific window to transfer your out-of-state driver's license and register your vehicle - both run through the Secretary of State's office in Illinois, not a county DMV.

Find the services available in your county

Illinois laws apply statewide, but offices, services, procedures and local requirements can vary by county. Select your county for verified local offices, services and official resources.

All 102 Illinois counties

Browse every county and county seat.

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Sources and References

102COUNTIES COVEREDAcross Illinois
12.5M+RESIDENTS REPRESENTEDIllinois population covered
1,000+TOPICS & GUIDESAnswers for real life
VerifiedSOURCED TO OFFICIAL RESOURCESEvery guide links to primary government sources