Union 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.
- Payment deadline
- First-half taxes are due September 1; second-half taxes are due March 1. Postmark by September 30 and March 31, respectively, avoids penalty.
- 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
View exemption application (opens in a new tab)Exemption filing
July 1, 2026, for a new Iowa homestead tax credit or exemption first claimed for the 2026 assessment year.
Senior relief
Union County states that eligible claimants who own and occupy their home and are 65 or older on or before January 1 of the assessment year may claim the 65+ homestead exemption in addition to the homestead credit.
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.
More exemption & appeal guidance →