When are property taxes due in Monroe County, Illinois?

Monroe 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 Monroe County, Illinois?

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

How do I pay Monroe County, Illinois property taxes?

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

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Monroe County Property Tax Due Date

Illinois

(618) 939-8681 213

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

Monroe County Treasurer

Phone

(618) 939-8681 213

How to Pay

Online

Pay using credit card or e-check

Visit Website →

By Mail

Mail check payable to Monroe 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 Monroe County

Monroe County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 34,962. Its county seat and largest city is Waterloo.

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

Related Resources

CountyRollCounty Office Directory

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