Peoria County deadline

Peoria County 2026 assessment complaint deadline

The 2026 county-wide complaint window closed on September 30, 2026.

County-wide model Peoria County used one complaint window for the whole county in 2026; this is not a township-by-township publication calendar.

2026 Board of Review complaint window

Closed

Peoria County county-wide

Opened: TBD

Deadline: September 30, 2026

The filing deadline has passed. You can still review the public record, address factual errors with the assessor, and prepare for the next assessment cycle.

Official Peoria County sources

Peoria County Board of Review published a 2026 filing deadline of September 30, 2026. HomeTaxChallenge verified that date on the Peoria County Board of Review site — the 2026 window is closed. Check with your assessor or the Board of Review for the next year's dates before filing.

Disclaimer: HomeTaxChallenge is not a government agency and is not affiliated with the Peoria County Assessment Office or Peoria County Board of Review. Always confirm dates and filing instructions on the official county sources above.