System maintenance will be performed on Sunday, August 30th, 2026, starting at 8:00 am US Central Time. We expect the maintenance to last 2-3 hours. During this maintenance window, the Parcel Search page will be unavailable.
The St. Clair County Administration and Courts Building is preparing to undergo extensive renovations that will affect parking, traffic, and building access. To aid those who are planning on visiting the building, we have set up an informational page that will provide the most up-to-date notices.
The Treasurer’s Office is responsible to safeguard, maintain and invest more than $185 million in County funds.
Our commitment is to provide excellence in public services. The St. Clair County Treasurer’s office exists simply as a resource which enables the public to benefit from the tax dollars they are required to pay.
Our goals include:
Treasurer
#10 Public Square Belleville, IL 62220
Business Hours: M-F 8:30am - 4:30pm