St. Clair County, IllinoisProperty records & tax offices
A direct property, payment, or map portal is not listed yet. Use the office contact below to find the right local service.
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- 2025 real-estate tax bills payable in 2026 were reported as being mailed; no specific 2026 mailing date was published for the next cycle.
Exemptions & appeals
View exemption application (opens in a new tab)Senior relief
The St. Clair County Assessor applies qualified homestead exemptions, including senior-related exemptions; the reviewed official page did not publish current local income or filing parameters.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.