Winnebago County, IowaProperty 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.
- Tax bill mailing
- Mid-to-late August 2026, according to the Treasurer FAQ.
- Payment deadline
- First-half taxes are due September 1, 2026 and become delinquent October 1; second-half taxes are due March 1, 2027 and become delinquent April 1.
- Assessment appeal
- April 2-April 25 informal review; April 2-April 30 formal Board of Review protest, subject to Iowa disaster-extension rules.
Exemptions & appeals
Exemption filing
July 1, 2026, for a new Iowa homestead tax credit or exemption first claimed for the 2026 assessment year.
Senior relief
Winnebago County Treasurer lists Iowa senior/elderly low-income property-tax credit information; the reviewed current source did not expose a single county-specific senior threshold.
Valuation limits
Iowa uses state rollback and levy rules; the reviewed official county source did not state a separate local annual valuation cap rule.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.