Winnebago County deadline tracker

Winnebago County 2026 assessment appeal deadlines

In Winnebago County, you don't get one countywide deadline. Each township publishes its assessment list in a local newspaper, then you generally have about 30 days to file with the Board of Review. City limits are not township lines — check your parcel.

How to use this tracker Find your township → note its status → if open, run a free estimate; if TBD, get an alert; if closed, review next-step options.
Open — You can still file for 2026. TBD — The assessment list is not published yet. Closed — The 2026 Board of Review window ended.

Verified against Winnebago County sources: September 25, 2026. Statuses use America/Chicago time.

Open for 2026 filing

0 townships

Publication date still TBD

0 townships

2026 filing window closed

14 townships
Closed

Burritt Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Cherry Valley Township

2026 window closed: September 4, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Durand Township

2026 window closed: September 4, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Harlem Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Harrison Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Pecatonica Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Rockford Township

2026 window closed: September 4, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Rockton Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Roscoe Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Seward Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Shirland Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window
Closed

Winnebago Township

2026 window closed: September 5, 2026

Review record corrections, exemptions, and preparation for the next filing cycle.

See options if you missed the window

Deadline alerts

Get an email when a TBD township publishes

Choose one or more townships. We'll store your email and selections so a publication alert can be sent when the county posts the dates.

Official Winnebago County sources

Winnebago County's 2026 Board of Review page lists two township publication groups. Complaints were due 30 calendar days after publication; both 2026 filing windows are now closed.

Disclaimer: HomeTaxChallenge is not a government agency and is not affiliated with the Winnebago County Assessment Office or Winnebago County Board of Review. Always confirm dates on the official county sources above. This is not legal, tax, or appraisal advice.