Cooper County Assessor

Gayle Linneman

660-882-2646

Gayle Linneman

FILING online is available only if you have your new assessment sheet with the account number and pin that was mailed to you.
OR
You may use our convenient drop box located at the public access (North doors) of the courthouse. 
This box is shared with the Collector's Office.  You may drop off your assessment list and/or your tax payments at any time that suits your schedule.

County Assessor


The Assessor's Office puts values on all Real Estate and Personal Property owned on January 1st of the year.

53.030 Every assessor shall take an oath or affirmation to support the Constitution of the United States and of this state, and to demean himself faithfully in office and to assess all of the real and tangible personal property in the county in which he assesses at what he believes to be the actual cash value.  He shall endorse this oath on his certificate of election or appointment before entering upon the duties of his office.
​
I ask that you please be respectful to my staff.  They are doing their job.

Personal Property:
            If you're new to the county please call or come in so we can get you on our rolls.
             If you lived in Cooper County and owned a vehicle on January 1st you will need to fill out an Assessment List.
             Please call office 660-882-2646 for assistance.
        

Real Estate: 
             Unless you have a change of address real estate is automatic.  Once your deed is recorded, we will get the transfer information, and the ownership name will be changed.
             If at any time you have any questions, please don't hesitate to call the office.  A member of my staff or myself will be happy to help you.

CURRENT STAFF:
Danah Nichols - Deputy Assessor PP
Gayle Linneman- Assessor
Tina Ray - Field Tech

cooper.integritygis.com - Link to our GIS Website - This website has photography and real estate information for Cooper County.

www.stc.mo.gov - Link to the State Tax Commission Website.

           

Contact Information

Contact Info
Office:   660-882-2646
Office Hours
Monday-Friday
9:00 AM - 5:00 PM
Closed 12-1 for lunch

Due to increasing security measures public should access the court house by using the North door (High St.).
Location
Cooper County Assessor's Office
200 Main Street, Room 22
Boonville, MO 65233

2nd floor of court house

Documents and Forms

Assessment list-mailed around January 1st to list vehicles etc. 
Due back to Assessor's Office March 1st. 

Impact Notices-notification to taxpayer that the assessed value of your real estate has increased.  Mailed the middle of June.  If you receive an Impact Notice in the mail you need to open it immediately and look at the value if you do not think that your property is worth the value that I have assessed, then you need to call or make an appointment right away.  If you wait until after July your value will not get changed until the next years taxes. Remember that the Assessor's Office determines the value of the property not taxes.

Sales letters-mailed to real estate with new ownership and the seller of said real estate on a monthly basis.  This letter and the requested information is used to update real estate and gives a better idea of market value in Cooper County.  Please return as soon as possible after you have received it.