Mercer availability
Review demonstrated
An evidence review has been demonstrated for selected properties in this county. This is partial demonstrated coverage, not every address or township. Your free property check determines the offer: $50 only for substantially complete self-filing information; $5 for useful verified incomplete, inconclusive or no-support evidence; or no purchase when trustworthy evidence is insufficient. A closed filing window permits next-cycle preparation; it does not certify future-year facts.
Start property checkDated product journey evidence
Evidence below is separate from county capability and your property’s offer. Local source-to-PDF fixtures are not hosted purchases. Shared commerce proof does not establish every address or township; only the normal property check determines the appropriate $5 or $50 product.
$5 property evidence review: unproven
Not separately exercised. not exercised. No dated product-specific journey proof has been admitted here. Existing county source/PDF evidence remains separately scoped; this does not establish a new failure, a countywide impossibility, or that both products must apply to one property.
$50 appeal preparation packet: unproven
Not separately exercised. not exercised. No dated product-specific journey proof has been admitted here. Existing county source/PDF evidence remains separately scoped; this does not establish a new failure, a countywide impossibility, or that both products must apply to one property.
Official dates, forms and filing instructions
Last checked 2026-11-07T14:03:23.838Z. Current detail unresolved; last verified information is retained below. Confirm the applicable notice and instructions with the official authority.
Last verified filing facts: 2026-11-01T14:08:19.870Z. Assessment year is distinct from tax payable year.
- deadline — 2026 assessment; Countywide
Published filing deadline: 2026-11-13. Opening date unknown. Confirm this is your township or scope with the official authority.
Full official source quote for Countywide — 2026 assessment
Other townships or scopes in the quote are source context, not deadlines for this scope.
The deadline to file an appeal with the Board of Review is 30 days after publication with a post mark date of November 13,2026.
Official source - deadline — 2026 assessment; Mercer County
Published filing deadline: 2026-11-13. Opening date unknown. Confirm this is your township or scope with the official authority.
Full official source quote for Mercer County — 2026 assessment
Other townships or scopes in the quote are source context, not deadlines for this scope.
The deadline to file an appeal with the Board of Review is 30 days after publication with a post mark date of November 13,2026.
Official source - deadline — 2026 assessment; Official quoted notice
Published filing deadline: 2026-11-13. Opening date unknown. Confirm this is your township or scope with the official authority.
Full official source quote for Official quoted notice — 2026 assessment
Other townships or scopes in the quote are source context, not deadlines for this scope.
Publication of the change of assessment notice to taxpayer was published in the Aledo Times Record. Appeal forms and rules are available at the Mercer County Supervisor of Assessments Office, the Mercer County Board of Review Office, or click the links below. The deadline to file an appeal with the Board of Review is 30 days after publication with a post mark date of November 13,2026. 2026 AVY Assessment Roll Books
Official source - form — 2026 assessment; Countywide
Farm appeal form 2026
Official source - form — 2026 assessment; Countywide
Non-Farm appeal form 2026
Official source - form — 2026 assessment; Mercer County
Farm appeal form 2026
Official source - form — 2026 assessment; Mercer County
Non-Farm appeal form 2026
Official source - publication — 2026 assessment; Quad townships (Eliza, Greene, Rivoli, Keithsburg) and Non-quad townships
Printed assessment publication: 2026-10-14. Calculated 30-calendar-day statutory endpoint: 2026-11-13 (35 ILCS 200/16-55(d)). Calculated 30-calendar-day endpoint, not a separately printed filing deadline. Check weekends and statutory holidays under 5 ILCS 70/1.11 and any official general extension; the printed applicable deadline controls. Publication alone does not establish a filing opening. Statutory rule; Weekend and holiday computation.
Note: The Mercer County CCAO has published and sent YR 2026 notice to taxpayers for all Quad townships Eliza, Greene, Rivoli, Keithsburg on October 14, 2026. Non-quad townships with a change in assessment and farmland notice on October 14, 2026 . Publication of the change of assessment notice to taxpayer was published in the Aledo Times Record.
Official source
Official guidance — assessment year not stated
Matched to the official source on 2026-11-07T14:03:23.838Z. These instructions do not confirm a current-year deadline or form version.
- filing method
Mailing and delivery address: Mercer County Board of Review Office
Official source - filing method
Complaints and other written correspondence sent by the United States mail shall be considered filed as of the postmark date in accordance with Section 1.25 of the Statute on Statutes. Complaints and other written correspondence sent by a delivery service other than the United States Postal System shall be considered as filed as of the date sent as indicated by the shipper's tracking label.
Official source
You file your own appeal. This information does not change county capability, verify a property’s filing eligibility, or unlock paid preparation. No legal/tax advice or county affiliation.
What the property check looks for
Your property
Address, PIN, assessment notice, parcel page, or tax record details.
Official records
Property details with the source named so you can check them.
What remains
Any official document or county instruction you still need to review on your own.
County availability is only a starting point.
This page only explains the available property-check path. Your saved property check can show whether to stop, add an official document, or review what information is still missing.