Whiteside County deadline tracker

Whiteside County 2026 assessment appeal deadlines

In Whiteside 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 Whiteside County sources: October 7, 2026. Statuses use America/Chicago time.

Open for 2026 filing

0 townships

Publication date still TBD

22 townships

TBD

Albany Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Clyde Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Coloma Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Erie Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Fenton Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Fulton Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Garden Plain Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Genesee Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Hahnaman Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Hopkins Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Hume Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Jordan Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Lyndon Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Montmorency Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Mount Pleasant Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Newton Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Portland Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Prophetstown Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Sterling Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Tampico Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Union Grove Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

TBD

Ustick Township

Not published yet. The 2026 filing deadline has not been posted.

You can prepare now, but confirm the official publication before treating the window as open.

2026 filing window closed

0 townships

Official Whiteside County sources

Whiteside County How to File an Assessment Appeal and Board of Review Rules: all complaints must be filed within 30 days after mailing of assessment change notices, or within 30 days after publication of assessment change notices, whichever is later. As of 2026-10-07 CT, no static per-township 2026 publication/deadline table is posted — township deadline rows stay TBD (do not invent dates). Complaints must be on the original Whiteside County Board of Review Assessment Complaint Form with an original signature; fax transmissions or e-mails will not be accepted. File in person by 4:30 p.m. on the deadline day or by mail (postmark = filing date) at 200 E Knox St, Morrison, IL 61270, with one copy of all supporting evidence (no evidence accepted after the complaint is filed). Supervisor of Assessments: (815) 772-5195; hours 8:30 a.m.–4:30 p.m. Mon–Fri.

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