When are property taxes due in Montgomery County, Illinois?

Montgomery 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 Montgomery County, Illinois?

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

How do I pay Montgomery County, Illinois property taxes?

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

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Montgomery County Property Tax Due Date

Illinois

(217) 532-9521

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

Montgomery County Treasurer

Phone

(217) 532-9521

How to Pay

Online

Pay using credit card or e-check

Visit Website →

By Mail

Mail check payable to Montgomery 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 Montgomery County

Montgomery County is a county located in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 28,288. Its county seat is Hillsboro.

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.