When are property taxes due in Alexander County, Illinois?

Alexander 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 Alexander County, Illinois?

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

How do I pay Alexander County, Illinois property taxes?

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

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Alexander County Property Tax Due Date

Name: Treasurer
Telephone: (618) 734-7009

Illinois

(618) 734-7009

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

Alexander County Treasurer

Phone

(618) 734-7009

How to Pay

Online

Pay using credit card or e-check

Visit Website →

By Mail

Mail check payable to Alexander County Treasurer

Visit Website →

In Person

Visit the Treasurer's office

Visit Website →

Other Counties in Illinois

Adams Bond Boone Brown Bureau Calhoun Carroll Cass

View all Illinois counties →

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