County Treasurer



Williamson County Treasurer
407 N. Monroe Street, Suite 104
Marion, IL 62959
Phone: 618-998-2142
Fax: 618-997-2541

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"


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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.