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Tax Sale Atlas

Hamilton County, IA tax sales

Tax Sale Atlas maps the Hamilton County, IA tax sale, one of 2,553 counties in 30 states. Iowa sells tax lien certificates paying up to 24%. Sale office, calendar and list locations read from the county’s own official pages on Jul 29, 2026.

How tax lien sales work in Hamilton County, seat of Webster City: sale calendar, auction platform, over-the-counter lists, and the offices that run each sale.

New to tax sales? Read how Iowa tax sales work or look terms up in the glossary.

Next sale
Iowa holds no tax deed auction.
Format
ZEUS
Registration
Registration is online only at www.iowataxauction.com.
County office
(515) 832-9542 (property tax); (515) 832-9540 (Treasurer's office)
Every displayed fact carries a source badge. Verified Jul 29, 2026 against official county and state pages.How we verify
On this page

How Hamilton County sells delinquent taxes

From lien to deed

Iowa holds no separate tax deed auction. The county treasurer makes out a deed for each parcel sold and unredeemed immediately after 90 days have expired from the date of completed service of the notice of expiration of the right of redemption, once the holder returns the certificate of purchase and pays the deed and recording fees.

Tax certificate sale (lien)

SRI / ZEUS
Run by
Hamilton County Treasurer
Frequency
annual
Typical timing
Annually in June.
Registration
Registration is online only at www.iowataxauction.com.
Next expected
on the third Monday in June, 2027 (window; exact date posts closer to the sale)
Sale list
Delinquent tax list and sale parcels (auction site, registration required)
When it runs
Annually in June. The Treasurer states "The Annual Tax Sale takes place in June of each year." The most recent sale was held Monday, June 15, 2026, beginning at 9:00 a.m. in the Supervisors' Board Room on the first floor of the Hamilton County Courthouse, 2300 Superior St., Webster City, with bidding closing at 10:30 a.m. An adjourned tax sale is held "any business day following the annual tax sale in which there are bidders present and there are parcels still available for sale."
Registration and deposit

Registration is online only at www.iowataxauction.com. The county states "No mailed or emailed registrations will be accepted." For the 2026 sale, registration opened Monday, May 18, 2026 and closed Thursday, June 11, 2026, with all steps completed by 11:59 p.m. on June 11. Bidders pay a non-refundable $40.00 registration fee by ACH debit and complete an online W-9 by the registration deadline. All bidders must be 18 or older as of the sale date. An entity bidder must have a federal tax identification number plus either a designation of agent for service of process on file with the Iowa Secretary of State or a verified statement of trade name on file with the Hamilton County Recorder. Registration and auction-site support is (800) 800-9588 or support@iowataxauction.com.

Sale format and venue
Bidding runs online even though the sale is convened at the courthouse. Bids may be uploaded before the sale but are not applied until the sale opens at 9:00 a.m. Parcels are listed in the order they were published, and Hamilton County does not use batches. Each parcel is offered starting at a 100% undivided interest, with bid-downs in whole percentage points from 99% to 1%. The certificate goes to the bidder designating the smallest percentage; ties at the smallest percentage are broken by a random selection process. Successful bidders receive an invoice at close and an ACH debit for the total automatically initiates from the account used for the registration fee. The total includes delinquent taxes, special assessments, interest, special assessment collection fees, publishing costs, and a $20.00 certificate fee for each certificate purchased. A $30.00 service fee applies to payments returned for insufficient funds, and a bidder whose payment is not honored has three business days to repay with guaranteed funds or the certificates are canceled. Certificates typically arrive 7 to 15 days after the sale. The Delinquent Tax List is published the week of May 25 in the Daily Freeman Journal (Webster City) and the South Hamilton Record-News (Jewell), and published parcels are also viewable on the auction site by Friday, May 29, though registration is required to access the data. Redemption interest is 2% per month on the sale amount and on subsequent taxes, with each fraction of a month counted as a whole month. Regular tax sale certificates can trigger the 90 day Notice of Right of Redemption after one year and nine months; public bidder parcels, marked with an asterisk on the published list because they were advertised for two years, allow the notice after nine months. The Treasurer requires all subsequent tax payments through the online tax sale module at www.iowatreasurers.org, with a $0.25 per parcel fee; payments made outside that module are treated as voluntary and omitted from the redemption calculation. Certificate assignment costs $100.00 per transaction and a Treasurer's Tax Sale Deed costs $25.00 per parcel. The Treasurer cancels a certificate if no affidavit of service under Iowa Code Section 447.12 is filed within three years of the sale.
Register on SRI / ZEUS
Source: Notice to Tax Sale Purchasers of the Terms and Conditions Governing the Annual Tax Sale of June 15, 2026 (Hamilton County Treasurer)· Verified Jul 29, 2026

Hamilton County tax sale list and auction calendar

For Hamilton County tax sale 2026 searches, use the county-run sources below rather than a copied parcel list, and confirm the parcel, registration cutoff, deposit, and payment deadline against the county before you bid.

  1. Get the advertised list

    Use Delinquent tax list and sale parcels (auction site, registration required) for the current advertised parcels, then recheck it before the auction.

  2. Register to bid

    Registration is online only at www.iowataxauction.com. Full requirements are in the sale card above.

  3. Sale day

    Iowa holds no tax deed auction. Bidding runs on ZEUS; check posted sale dates, registration status, and bidding windows there.

  4. Confirm with the office

    If the list, platform, and notice disagree, use County Treasurer as the source to confirm which parcels are actually offered.

Before you bid in Hamilton County

  1. Start with the live sale list

    Pull the current advertised parcels from Delinquent tax list and sale parcels (auction site, registration required). Lists can change before the sale, so recheck the county source before you price a parcel.

  2. Confirm registration and deposit

    Registration is online only at www.iowataxauction.com. The county states "No mailed or emailed registrations will be accepted." For the 2026 sale, registration opened Monday, May 18, 2026 and closed Thursday, June 11, 2026, with all steps completed by 11:59 p.m. on June 11. Bidders pay a non-refundable $40.00 registration fee by ACH debit and complete an online W-9 by the registration deadline. All bidders must be 18 or older as of the sale date. An entity bidder must have a federal tax identification number plus either a designation of agent for service of process on file with the Iowa Secretary of State or a verified statement of trade name on file with the Hamilton County Recorder. Registration and auction-site support is (800) 800-9588 or support@iowataxauction.com.

  3. Check the state rules that change the bid

    Read the Iowa due-diligence checklist before bidding. Redemption, liens that survive a tax deed, title cleanup, and payment deadlines can change what a parcel is worth.

  4. Set a walk-away number

    Work out what the parcel is actually worth with the rural land value estimator, then turn it into a ceiling with the tax deed max-bid calculator.

Over-the-counter (leftover) purchases

Two routes reach parcels after the June sale. Parcels that remain unsold for want of bidders are carried to adjourned sales, which the treasurer sets at intervals of not more than two months until the next annual sale. Separately, certificates struck to the county at the public bidder sale may be assigned by the county for the total amount due on the date of assignment, or for a compromised amount, under a written agreement filed with the treasurer and a 10 dollar assignment transaction fee. Ask the county treasurer which county-held certificates are available for assignment.

New to this path? Read how over-the-counter certificates work. Every state has its own name for what goes unsold, so check what Iowa calls its leftover tax-sale inventory.

Use the arrow keys to switch between these sections.

County offices

Tax Collector (runs the certificate sale)

Hamilton County Treasurer

(515) 832-9542 (property tax); (515) 832-9540 (Treasurer's office)

Hamilton County Courthouse, 2300 Superior Street, Suite 7, Webster City, IA 50595

Official website

County notes

  • The Treasurer is Matt Matteson, listed on the 2026 Notice to Tax Sale Purchasers with email mmatteson@hamiltoncounty.org and fax (515) 832-9544.
  • Office hours are Monday through Friday, 8:00 a.m. to 4:30 p.m.
  • The county describes the sale as "an open competitive bidding process" under Iowa Code Chapter 446 and notes its published information is "provided for reference purposes only," leaving parcel research to the bidder.
  • The county hosts no standalone downloadable parcel list. The list reaches investors through the two newspapers and through the registered-bidder view on the auction site.
  • Bids are placed through the Iowa Tax Auction platform rather than by calling out at the courthouse, but the sale is convened in the Supervisors' Board Room and adjourned sales depend on bidders being present.

Iowa rules

Max interest rate
24% per year, fixed by statute (not bid down)
Minimum return
No statutory minimum return; what you earn is set by the share of ownership taken at the sale
Redemption
A parcel may be redeemed at any time before the right of redemption expires. After one year and nine months from the date of sale, the certificate holder may serve a notice of expiration of the right of redemption on the person in possession, the person in whose name the parcel is taxed, and every mortgagee, contract vendor, recorded lessor, and other party of record. The right of redemption then ends 90 days after that service is complete, which means the affidavit of service has been filed with the county treasurer. Three shortened tracks exist: nine months from a public bidder sale under section 446.18, and three months from an abandoned-property or public nuisance sale under section 446.19A or 446.19B. After the treasurer delivers the deed, redemption is possible only through an equitable action in district court, and only by a person who could have redeemed during the 90-day window.
Surplus proceeds
No surplus arises. The deed conveys the parcel to the certificate holder rather than selling it to the highest bidder, so there are no excess proceeds to distribute. Where the winning bid was less than 100 percent, the deed conveys only that undivided percentage interest in the parcel.
Governing statute
Iowa Code Chapter 446

A tax deed does not convey marketable title. Most buyers file a quiet title action before they can resell or insure the property. See the due diligence guide.

See the full Iowarules and every county →

Frequently asked questions

Does Hamilton County, Iowa sell tax liens or tax deeds?

Tax lien certificates. In Iowa investors buy the lien, not the property; the County Treasurer runs the sale.

When is the Hamilton County tax certificate sale?

Annually in June. The Treasurer states "The Annual Tax Sale takes place in June of each year." The most recent sale was held Monday, June 15, 2026, beginning at 9:00 a.m. in the Supervisors' Board Room on the first floor of the Hamilton County Courthouse, 2300 Superior St., Webster City, with bidding closing at 10:30 a.m. An adjourned tax sale is held "any business day following the annual tax sale in which there are bidders present and there are parcels still available for sale." Registration and bidding happen on the county's online platform. Always confirm the exact date with the County Treasurer before the sale.

How often does Hamilton County hold tax deed sales?

Hamilton County holds its tax deed sale none. Iowa holds no tax deed auction. Each sale is scheduled and advertised in advance, so check the county's tax deed calendar for the next posted date.

I own a property in this sale. Can I stop it?

Often yes, by paying the overdue taxes, interest, and costs before the deadline. Iowa's redemption rule: 1 year 9 months from the sale before the notice of expiration can be served, then 90 days after service is complete. Call the County Treasurer as early as possible for your exact payoff and options; deadlines are strict. Free help: lawhelp.org lists legal aid programs, and consumerfinance.gov lists HUD-approved housing counselors.

Where can I find the Hamilton County tax sale list?

Hamilton County posts its tax sale list at iowataxauction.com. Lists go up ahead of each sale and keep changing until the sale date, so confirm every parcel against the county's legal advertisement before you bid.

Verified Jul 29, 2026 against official county and state sources.

Tax Sale Atlas publishes educational information about public tax sale processes. This is not legal, financial, or investment advice. Rules, dates, and fees change; confirm with the county office before you bid.

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Compare sale calendars, platforms, and rules across the state, or read the guides before you bid.

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