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: August 27, 2020
2nd Installment: October 8, 2020
Make checks payable to: "Williamson County Treasurer"
- Property Tax Payment Instructions
- Property Tax Exemptions
- Tax Collection Schedule
- Tax Sale Information
- Tax Sale Registration
- Property Tax FAQ
- Guide to the Tax Process
- Property Tax Prepayment Program
- Returned Checks
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 November 8, 2020.
The property tax sale will be Thursday, December 10, 2020.
No property tax payments will be accepted after Wednesday, December 9, 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.