When are property taxes due in Clay County, Illinois?

Clay 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 Clay County, Illinois?

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

How do I pay Clay County, Illinois property taxes?

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

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Clay County Property Tax Due Date

Illinois

(618) 665-3727

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

Clay County Treasurer

Phone

(618) 665-3727

How to Pay

Online

Pay using credit card or e-check

Visit Website →

By Mail

Mail check payable to Clay County Treasurer

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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 Clay County

Clay County is a county in the southeastern portion of the U.S. state of Illinois. As of the 2020 United States census, the population was 13,288. Since 1842, its county seat has been Louisville, in the center of the county's area.

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

Related Resources

CountyRollCounty Office Directory

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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.