Brown 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.
- Payment deadline
- July 24, 2026 first installment; September 18, 2026 second installment, as published on the official Brown County Treasurer page.
Exemptions & appeals
View exemption application (opens in a new tab)Senior relief
Brown County publishes Senior Homestead and 2026 Low Income Senior Citizen Assessment Freeze Homestead forms; eligibility and filing requirements are handled by the Supervisor of Assessments.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.