Iroquois County, IllinoisProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Assessment appeal
- Within 30 days after publication of the Supervisor of Assessment's Notices of Assessment Change; the reviewed 2026 page did not publish a single calendar date.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
January 1 through July 1 for the Low-Income Senior Citizen Assessment Freeze Homestead Exemption; the reviewed official page did not publish a separate 2026 general homestead deadline.
Senior relief
Iroquois County identifies the Senior Homestead Exemption and Low-Income Senior Citizen Assessment Freeze. The freeze filing period is January 1 through July 1 and requires prior-year federal tax-return and SSA-1099 documentation.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →