When are property taxes due in Union County, Illinois?

Union 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 Union County, Illinois?

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

How do I pay Union County, Illinois property taxes?

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

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Union County Property Tax Due Date

Illinois

2026 Property Tax Due Dates

Installment 1

Varies (Cook Co.: March 1)

First installment (varies by county)

Installment 2

Varies (Cook Co.: August 1)

Second installment

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

Payment Methods

Online, Mail, In-Person

Union County Treasurer

How to Pay

Online

Pay using credit card or e-check

By Mail

Mail check payable to Union County Treasurer

In Person

Visit the Treasurer's office

Other Counties in Illinois

Adams Alexander Bond Boone Brown Bureau Calhoun Carroll

View all Illinois counties →

About Union County

Union County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 17,244. Its county seat is Jonesboro.

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

Related Resources

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