When are property taxes due in LaSalle County, Illinois?

LaSalle 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 LaSalle County, Illinois?

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

How do I pay LaSalle County, Illinois property taxes?

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

← Back to Illinois

LaSalle 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

LaSalle County Treasurer

How to Pay

Online

Pay using credit card or e-check

By Mail

Mail check payable to LaSalle 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 LaSalle County

LaSalle County is a county located within the Fox Valley and Illinois River Valley regions of the U.S. state of Illinois. As of the 2020 Census, it had a population of 109,658. Its county seat and largest city is Ottawa.

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

Related Resources

CountyRollCounty Office Directory

Find the assessor, treasurer & recorder for LaSalle

View office directory

Property Tax FAQ Tax Calendar

Get Deadline Reminders

We'll email you 336 hours before your property taxes are due.

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