Williamson County Treasurer
407 N. Monroe Street, Suite 104
Marion, IL 62959
Office Hours: Monday-Friday, 8:00 a.m. - 4:00 p.m.Contact Us
Property Tax Payment Dates
1st Installment: To be determined.
2nd Installment: To be determined.
Make checks payable to: "Williamson County Treasurer"
- Property Tax Payment Instructions
- Property Tax Exemptions
- Tax Collection Schedule
- Tax Sale Information
- Property Tax FAQ
- Guide to the Tax Process
- Property Tax Prepayment Program
- Returned Checks
Notices Due to Covid19 mailing of tax bills have been delayed, check the website for updates.
A 1-1/2% interest amount will be charged on the delinquent amount per month or ANY portion of a month.
To avoid the publication of your name as being a delinquent taxpayer, pay by October 30, 2020.
The property tax sale will be Tuesday, December 1, 2020.
No property tax payments will be accepted after Monday, November 30, 2020.
There is a $25 processing fee, in addition to any accrued statutory interest, for each check that is returned by the taxpayer's bank for any reason.