Marion 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
- Usually mid-August; the reviewed county page reported August 15, 2025, and did not publish a 2026 mailing date.
- 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
Exemption filing
July 1, 2026, for a new Iowa homestead tax credit or exemption first claimed for the 2026 assessment year.
Senior relief
Marion County identifies an Iowa property-tax credit for Iowa residents aged 65 or older, or totally disabled residents aged 18 or older; current income guidelines and the 2026 claim deadline are handled through the Treasurer's credit materials.
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.