When are property taxes due in McHenry County, Illinois?

McHenry 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 McHenry County, Illinois?

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

How do I pay McHenry County, Illinois property taxes?

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

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McHenry County Property Tax Due Date

Illinois

(815) 334-4260

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

McHenry County Treasurer

Phone

(815) 334-4260

How to Pay

Online

Pay using credit card or e-check

Visit Website →

By Mail

Mail check payable to McHenry 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 McHenry County

McHenry County is located in the U.S. state of Illinois. According to the 2020 Census, it had a population of 310,229, making it the sixth-most populous county in Illinois. Its county seat is Woodstock.

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.