When are property taxes due in Clinton County, Illinois?

Clinton County property taxes are due Varies (Cook Co.: March 1). A second installment is due Varies (Cook Co.: August 1). This deadline applies to all counties in Illinois.

What is the penalty for late property tax payment in Clinton County, Illinois?

The late payment penalty in Clinton County is 1.5% per month starting day after due.

How do I pay Clinton County, Illinois property taxes?

You can pay Clinton County property taxes via Online, mail, in-person.

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Clinton County Property Tax Due Date

Illinois

(618) 594-2464 650

2026 Property Tax Due Dates

Official Source

Installment 1

Varies (Cook Co.: March 1)

First installment (varies by county)

Installment 2

Varies (Cook Co.: August 1)

Second installment

Pay Taxes Online →

Penalty: 1.5% per month starting day after dueGrace period: None

Payment Methods

Online, Mail, In-Person

Clinton County Treasurer

Phone

(618) 594-2464 650

How to Pay

Online

Pay using credit card or e-check

Visit Website →

By Mail

Mail check payable to Clinton County Treasurer

Visit Website →

In Person

Visit the Treasurer's office

Visit Website →

Other Counties in Illinois

Adams Alexander Bond Boone Brown Bureau Calhoun Carroll

View all Illinois counties →

About Clinton County

Clinton County is a county located in the U.S. state of Illinois. At the 2020 census, the population was 36,899. Its county seat is Carlyle.

Source: Wikipedia — content available under CC BY-SA 4.0

Related Resources

CountyRollCounty Office Directory

Find the assessor, treasurer & recorder for Clinton

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Property Tax FAQ Tax Calendar

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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.