St. Clair County, MissouriProperty records & tax offices
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
- Mid-November 2026; St. Clair County Collector states current tax statements are mailed in mid-November.
- Payment deadline
- December 31, 2026 postmark without penalties and interest; the 2026 delinquent tax sale is scheduled for the fourth Monday of August.
- Assessment appeal
- July 13, 2026 (the second Monday in July statutory county Board of Equalization filing date); a Missouri State Tax Commission complaint is due September 30, 2026, or within 30 days after the county Board decision, whichever is later.
Exemptions & appeals
Senior relief
Missouri Property Tax Credit (Circuit Breaker) may provide a state income-tax credit to eligible senior or disabled homeowners/renters; no additional county-specific senior program was verified in the official sources reviewed.
Valuation limits
No general local annual valuation cap was verified. Missouri real property is generally reassessed in odd-numbered years, with statutory assessment ratios of 19% residential, 12% agricultural, and 32% commercial; any local senior credit limits tax liability rather than market or assessed value.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.