Cooper 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.
- Payment deadline
- For the 2026 tax year, Missouri real-estate and personal-property taxes are due December 31, 2026; a December 31 postmark is timely where the county accepts mailed payment.
- Assessment appeal
- July 13, 2026 (second Monday in July statutory county Board of Equalization filing deadline); the Cooper County Assessor warns taxpayers not to wait beyond July. The Missouri State Tax Commission complaint deadline is September 30, 2026, or within 30 days after the Board decision, whichever is later.
Exemptions & appeals
Exemption filing
March 1, 2026, for Cooper County personal-property assessment lists; no general Missouri homestead exemption or separate 2026 homestead filing program was verified.
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 12% agricultural, 19% residential, and 32% commercial; a local senior property-tax credit, where authorized, 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.
More exemption & appeal guidance →