Rock Island 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 changed assessments for the applicable assessment district; no specific 2026 calendar date was published.
Exemptions & appeals
View exemption application (opens in a new tab)Senior relief
Rock Island County's 2026 Senior Assessment Freeze requires at least one owner age 65 or older by December 31, 2026 and 2025 household income no greater than $75,000; the reviewed 2026 notice identifies the assessment office at 1504 Third Avenue.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.