Mary A. McClellan, CIAO
Assessment inquiries: 309-582-7814 or 309-582-4747 GIS Dept inquiries: 309-582-4818
Parcel Assessment records can be searched by clicking on this link:
GIS Department: We are anticipating our GIS/tax maps to be online with the county website in January of 2023.
Contact the GIS department for all questions and requests.
Phone: 309-582-4818 OR 582-4747
Contact your Township Assessor for all assessment questions and inquiries. (contact list below)
The Township Assessor is responsible for valuing real estate and assessing a property.
Assessors do not calculate the tax rate.
To determine your tax bill, the equalized assessed value of your property is multiplied by the tax rate for the tax code area in which your property lies. This arrives at the actual amount of tax dollars you owe.
Note: Review the left-hand column on the tax bill. This column will show the tax calculation. Also, by reviewing this column, it will ensure you have received all of the exemptions to which you are entitled; such as the General Homestead Exemption, Disabled Persons, Senior Citizens, Senior Citizens Assessment Freeze, Homestead Improvement Exemption, Disabled Veterans and Returning Veterans. See the documents section of this website to download a copy of the exemption in which you may want to apply for.
|Township||Assessor||Assessor contact information|
|Eliza-Duncan-Perryton (Multi)||Tiff Newswander||(309) 337-4297|
|Preemption||Laurie Epperly||(309) 754-9181|
|Richland Grove||Laurie Epperly||(309) 476-8611|
|New Boston-Millersburg(Multi)||Darla Dixon||(309) 737-1222|
|Mercer||Tiff Newswander||(309) 582-8291|
|Greene||David Johnson||(309) 596-2530|
|Rivoli||Laurie Epperly||(309) 737-9791|
|Keithsburg-Abington-Ohio Grove (Multi)||Janet Dekeyrel||(309) 586-4281|
|Suez-North Henderson (Multi)||Michelle Adams||(309) 464-0069|
The Mercer County Supervisor of Assessments Office
100 SE 3rd Street, First Floor
Aledo, IL 61231
Phone: (309) 582-7814*
(*Option 7 on automated menu)
Fax: (309) 582-2541
We are located on the west side of the first floor of The Mercer County Courthouse,
Lisa McWhorter, Office Clerk
GIS Department and Assessment Assistant Director
The Supervisor of Assessments mission statement:
The Mercer County Supervisor of Assessments Office strives to administer an accurate, fair, uniform, and
timely assessment of all real property in Mercer County in accordance with and as mandated by the Illinois
Property Tax Code. The County Assessment Office is responsible for providing instructions to township
assessors that promote uniformity of assessments throughout the different districts. This office also
administers homestead exemptions, property transfers, parcel map maintenance and serves as the clerk for
the Board of Review.
It is the function of the County Assessment Office to monitor and direct the countywide valuation of real
property for the purpose of real estate taxation. This mandated function includes but is not limited to:
- Provide assistance and information to the individual township assessors
- Monitor all functions for compliance with state statutes and IL Department of Revenue procedures
- Apply exemptions and preferential assessments
- Analyze sales data and conduct sales ratio studies
- Apply equalization factors
- Provide proper taxpayer notification of assessments through mailed notices and publication
- Monitor and direct an unbiased appeal procedure to assure due process
- Prepare abstracts and reports for submission to the Illinois Department of Revenue
- Timely certification of the completed assessment roll to the County Clerk in manner to facilitate timely tax calculation and billing as prescribed by statute
- Assist Board of Review in defense of decisions when appealed to the Illinois Property Tax Appeal Board
- Maintain Parcel Identification Numbering system
- Maintain an accurate county cadastral map system, including line maps, and other property & owner information, to be used by the property tax function, other county offices, other governmental offices and the public, in conjunction with the county's GIS (Geographical Information System).
Note: Data provided through The GIS department is for reference purposes only. It is not meant to substitute for a true title search, zoning verification, or survey. Mercer County assumes no responsibility, or claim, as to the accuracy of the data. Mercer County does not make any claims as to the fitness of use of this data for any particular purpose. Any maps provided to you from our GIS Department ARE NOT A LEGAL SURVEY.
Notice to Taxpayer
Preamble and Publication List of Changes in Assessment for TY2021
Farmland Notice to Taxpayer
CHANGE OF ADDRESS
NO CHANGE OF ADDRESS SHALL BE IMPLEMENTED UNLESS THE PERSON REQUESTING THE CHANGE IS THE OWNER OF THE PROPERTY, A TRUSTEE OR A PERSON HOLDING THE POWER OF ATTORNEY FROM THE OWNER /TRUSTEE OF THE PROPERTY. The CHANGE OF ADDRESS FORM can be found in the documents section. Mail the completed form to: The Mercer County Assessor, 100 SE 3RD Street, Aledo, IL 61231
FARMLAND REVIEW COMMITTEE
FOR FURTHER INFORMATION (click blue highlight area to view documents) FARMLAND ASSESSMENT REVIEW IN THE DOCUMENTS SECTION. ALSO SEE CERTIFIED VALUES FOR 2017-2022.
General Homestead Exemption
Senior Citizen Homestead Exemption
You must apply for the exemption with the County Assessment Office. You can get an application here (SENIOR CITIZEN HOMESTEAD EXEMPTION FORM) or you can call (309) 582-7814 and one will be mailed to you. Starting in 2014, after the initial application is approved, this exemption will automatically renew. You will be mailed a Senior Citizen Assessment Freeze Homestead Exemption application each subsequent year in the event you may qualify for this exemption.
Senior Citizen Assessment Freeze Homestead Exemption
PTAX 340 application Apply for the Senior citizens assessment freeze homestead exemption with the County Assessment Office. You can obtain an application from the assessment office by calling (309) 582-7814. Note: After the initial application is approved, you will be mailed a renewal form each subsequent year.
Persons with Disabilities Homestead Exemption
This exemption reduces the Equalized Assessed Value (EAV) by the amount of the exemption. For the current tax year, the reduction is $2,000.
To be eligible for the exemption, the taxpayer must be "unable to engage in any substantial gainful activity by reason of a medically determinable physical or medical impairment which can be expected to result in death or can be expected to last for a continuous period of not less than 12 months." A person becoming disabled during the assessment year is eligible in that same year.
- A class 2 (or 2A) Illinois Persons with Disabilities Exemption Identification Card from the Illinois Secretary of State's Office. (Illinois Disabled Person Identification Card Application)
- Proof of Social Security Administration disability benefits.
- Proof of Veterans Administration disability benefits.
- Proof of Railroad or Civil Service disability benefits.
- An examination by a physician (must meet the same standards as used by the Social Security Administration). (PHYSICIANS STATEMENT FORM)
- An eligible taxpayer must occupy the property as their primary residence as of January 1 of the assessment year, must be liable for paying the real estate taxes and must be an owner of record or have a legal or equitable interest in the property as evidenced by a written instrument
A taxpayer may not claim the exemption if they claim the Disabled Veterans Homestead Exemption (35ILCS 200/15-169).
You must apply for the exemption with the County Assessment Office. You can get an application here (PTAX 343 - PERSONS WITH DISABILITIES HOMESTEAD EXEMPTION FORM) or you can call (309) 582-7814 and one will be mailed to you. After the initial application is approved, you will be mailed a renewal form each subsequent year.(PHYSICIAN’S STATEMENT FORM)
(ILLINOIS DISABLED PERSON IDENTIFICATION CARD APPLICATION)
Disabled Veterans' Homestead Exemption
The Disabled Veterans' Standard Homestead Exemption provides a reduction in a property's EAV to a qualifying property owned by a veteran with a service-connected disability.
Beginning in tax year 2015, a $2,500 homestead exemption is available to a veteran with a service-connected disability of at least 30% but less than 50%; a $5,000 homestead exemption is available to a veteran with a service-connected disability of at least 50% but less than 70%; veterans with a service-connected disability of at least 70% are exempt from paying property taxes on their primary residence.
- Be an Illinois resident who has served as a member of the U.S. Armed Forces on active duty or state active duty, Illinois National Guard, or U.S. Reserve Forces and not dishonorably discharged.
- Have at least 30% service-connected disability certified by the U.S. Department of Veterans' Affairs.
- Must be the owner of record and occupy the house as of January 1 of the assessment year.
- The property must have a total equalized assessed value of less than $250,000 for the primary residence.
This exemption is available to the unmarried surviving spouse of a service-connected veteran provided that the veteran was in receipt of the exemption prior to his/her death. Additionally, beginning in tax year 2015 and thereafter, the unmarried surviving spouse of a service member killed in the line of duty is exempt from paying property taxes on the primary residence. Once approved, qualifying veterans and surviving spouses must file an annual application by their counties' deadlines to continue to receive this exemption.
How do I apply for this exemption?
Disabled Veterans' Standard Homestead Exemption Forms, PTAX- 342 and PTAX- 342 R (renewal) are located in the documents section of this county website.
Returning Veterans' Homestead Exemption
- Be an Illinois resident who has served as a member of the U.S. Armed Forces, Illinois National Guard, or U.S. Reserve Forces.
- Returning from active duty in an armed conflict involving the armed forces of the United States during the assessment year.
- A veteran who dies during his or her active duty service is eligible to receive this exemption.
- Owned or had a legal or equitable interest in the property used as the principal place of residence on January 1 of the assessment year.
- Must be liable for the payment of the property taxes.
This exemption may be claimed only in the year in which the eligible veteran taxpayer returns from active duty in an armed conflict. If a veteran taxpayer receives this exemption, then is again deployed on active duty in an armed conflict and returns again in a subsequent year, the veteran taxpayer is eligible for this exemption again if the other conditions are met.
You must apply for the exemption with the County Assessment Office. You can get an application here (PTAX-341 RETURNING VETERANS HOMESTEAD EXEMPTION FORM) or you can call (309) 582-7814 and one will be mailed to you. After the initial application is approved, you will be mailed a renewal form each subsequent year.