Warren County, MO Assessor

Our website is currently being updated to better serve you.

While we work on creating a more helpful and user-friendly experience, online access is temporarily unavailable. Our team is still here to assist you:

Phone: 636-456-8885
Fax: 636-456-9024
Email: property@warrencountymo.gov
Office Hours: Monday - Friday, 8:30-4:30
Location: 101 Mockingbird Lane • Real Estate Dept. Suite 202 • Personal Property Dept. Suite 204 Warrenton, MO 63383

Thank you for your patience - we look forward to welcoming you back soon.

PLEASE MAIL IN OR E-FILE PERSONAL PROPERTY ASSESSMENT SHEETS. WE ARE UNABLE TO PROCESS EMAILED PERSONAL PROPERTY ASSESSMENT SHEETS.

HAVE TAX QUESTIONS? LOOKING FOR TAX RECIEPTS? CONTACT THE COUNTY COLLECTOR AT 636-456-3330 OR VISIT THEIR WEBSITE, HTTPS://WARRENCOUNTYMO.ORG/COUNTY-COLLECTOR/, FOR HELP.