Warren County Supervisor of Assessments

100 W. Broadway, 2nd Floor 309-734-8561
Monmouth, IL 61462-1761 warrencountyassessor@warrencountyil.gov
Monday – Friday 8:00 a.m. to 4:30 p.m. except holidays. www.warrencountyil.com


Supervisor of Assessments:

  Michael McVey - warrencountyassessor@warrencountyil.gov


   Autumn Chapin - warrencountyassessor2@warrencountyil.gov

   Kimberly Polhans - warrencountyassessor1@warrencountyil.gov






Assesssment information can be found at:  https://il1374.cichosting.com/atasportal/ 
Map data is at:  https://warrenco-094.maps.arcgis.com/apps/webappviewer/index.html?id=ab19af089b1549f58ea5af6a35d73d81


See below for information on using these two sites.  Thank  you for your understanding during these challenging times.





Publication in the Review Atlas is September 27, 2023.

Deadline to file a complaint with the Board of Review is October 27, 2023.




  Exemption Application and Renewal Forms:


Senior Citizens Assessment Freeze PTAX-340 

Application for Senior Citizens Homestead Exemption PTAX-324

Application for Returning Veterans PTAX-341

Application for Standard Homestead Exemption for Veterans with Disabilities (SHEVD) PTAX-342

Annual Verification (Renewal) of Eligibility for Standard Homestead Exemption for Veterans with Disabilities PTAX-342-R

Application for Homestead Exemption for Persons with Disabilities PTAX-343

Physician’s Statement for the Homestead Exemption for Persons with Disabilities PTAX-343-A

Annual Verification (Renewal) of Eligibility for the Homestead Exemption for Persons with Disabilities PTAX-343-R



Assessment and Ownership Information


Assessment Data and current property ownership information is available by phone and email. The information may now also been seen at https://il1374.cichosting.com/atasportal/  This web portal contains general information in addition to limited property record card data.  Depending on your web browser setting you may have to allow pop ups to view the basic property record card.  Copies of property record cards and parcel maps may be obtained from our office and will be sent by regular mail along with an invoice to the address you provide when you make your request.

There is now a GIS option to view aerial photography available through the web portal however the only information that appears when a parcel is selected is the parcel number, site address, owners name, brief legal description and total acreage if available.  Additional information is available by clicking on the 3 dots in the lower right hand corner of the pop up box and selecting view attribute table. 

To go directly to the Tax Parcel App to view parcels on an aerial without going through the data portal use https://warrenco-094.maps.arcgis.com/apps/webappviewer/index.html?id=ab19af089b1549f58ea5af6a35d73d81  The dates of the aerials used at the various viewing levels is not known but might be as old as 2007.  To search on this site you must have the Owners name, Site Address or Map number which is the 10 digit parcel number without dashes.

Requests for custom reports must be made in writing detailing the information and format you are requesting.  Once the cost of the report is determined payment must be made in advance.  Click here for the current fee schedule.

Things to know when using the web portal:


When you are doing inquires the Tax Year is the same as the Assessment Year.  For example, if you are wanting to see what the assessment or exemptions were for 2017 payable in 2018 you will need to inquire on Tax Year 2017.  NOTE:  Assessments shown online at the Clerk, DOR (Department of Revenue) or Treas (Treasurer) levels are after adjustments have been made for various exemptions applied at the time property taxes are calculated and are not changes to the actual assessed value of the property.

If you are doing a search by address the direction is a single letter, N, S, E or W but the system does not require you to include if it is a street (ST) or avenue (AVE).  Your chances of getting results are better if you stop after the street name especially if you are not sure which it is or how it is abbreviated.  If you have a parcel number from a property record card do not enter the 94 since that is the county number and does not appear anywhere in the system.  Parcel Numbers have to be entered with dashes (XX-XXX-XXX-XX) or can be entered in the Alternate Parcel Number field without (XXXXXXXXXX).  Please note, if you are doing an inquiry by parcel number on the GIS site you have to use the alternate parcel.

General Information:

Change of address requests must be made in writing and must include a written signature by letter or you can click here to download a change of address request form (pdf),  Completed forms may be submitted to this office by either mail or e-mail.

Click here to download or view a listing if the first two digits of the parcel number for each township along with a listing of which town, lake or village is located in each township

Contact our office if you have questions regarding qualifications and application proceedures for homestead exemptions in our County. All homestead exemptions require the property be your legal/permanent residence.  Beginning dates and other guidelines vary by exemption once the property becomes your permanent residence.

Online access to frequently asked questions may also be available at the Illinois Department of Revenue website: https://www2.illinois.gov/rev/Pages/default.aspx

For more information regarding Illinois Department of Revenue information on how farmland is assessed go to:  https://www2.illinois.gov/rev/localgovernments/property/Pages/farmland.aspx