Winnebago County, IA tax sales
Tax Sale Atlas maps the Winnebago 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 Winnebago County, seat of Forest 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
- County site
- Registration
- Registration is online only at www.iowataxauction.com.
- County office
- 641-585-2322
On this page
How Winnebago 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)
- Run by
- Winnebago County Treasurer
- Frequency
- annual
- 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)
When it runs
Registration and deposit
Registration is online only at www.iowataxauction.com. The county states that "No mailed or emailed registrations will be accepted." For the 2026 sale, registration opened Monday, May 18, 2026 at 12:01 a.m. and every step had to be finished by 11:59 p.m. Thursday, June 11, 2026. Bidders pay a non-refundable $45.00 registration fee by ACH debit and complete the online W-9 by the registration deadline. All bidders must be 18 or older as of the sale date. An entity bidder needs 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 Winnebago County Recorder. Bidding opens at a 100 percent undivided interest and bids down in whole percentage points from 99 percent to 1 percent; the county confirms it does not use batches. Bids may be uploaded before the sale but are not applied until 9:00 a.m. on sale day. At the 10:30 a.m. close, each certificate goes to the bidder naming the smallest percentage, and ties at that percentage are settled by a random selection process. Winners are invoiced when the sale closes and an ACH debit pulls the total from the account used for the registration fee, covering delinquent taxes, special assessments, interest, collection fees, publishing costs, and a $20.00 certificate fee per certificate. Auction site support is (800) 800-9588 or support@iowataxauction.com.
Sale format and venue
Winnebago County tax sale list and auction calendar
For Winnebago 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.
Get the advertised list
Use June 2026 annual tax sale publication list (delinquent real estate, mobile homes, special assessments) for the current advertised parcels, then recheck it before the auction.Register to bid
Sale day
Iowa holds no tax deed auction. Bidding runs on County site; check posted sale dates, registration status, and bidding windows there.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 Winnebago County
4 checks
Start with the live sale list
Pull the current advertised parcels from June 2026 annual tax sale publication list (delinquent real estate, mobile homes, special assessments). Lists can change before the sale, so recheck the county source before you price a parcel.Confirm registration and deposit
Registration is online only at www.iowataxauction.com. The county states that "No mailed or emailed registrations will be accepted." For the 2026 sale, registration opened Monday, May 18, 2026 at 12:01 a.m. and every step had to be finished by 11:59 p.m. Thursday, June 11, 2026. Bidders pay a non-refundable $45.00 registration fee by ACH debit and complete the online W-9 by the registration deadline. All bidders must be 18 or older as of the sale date. An entity bidder needs 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 Winnebago County Recorder. Bidding opens at a 100 percent undivided interest and bids down in whole percentage points from 99 percent to 1 percent; the county confirms it does not use batches. Bids may be uploaded before the sale but are not applied until 9:00 a.m. on sale day. At the 10:30 a.m. close, each certificate goes to the bidder naming the smallest percentage, and ties at that percentage are settled by a random selection process. Winners are invoiced when the sale closes and an ACH debit pulls the total from the account used for the registration fee, covering delinquent taxes, special assessments, interest, collection fees, publishing costs, and a $20.00 certificate fee per certificate. Auction site support is (800) 800-9588 or support@iowataxauction.com.
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.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
unsold certificates
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)
Winnebago County Courthouse, 126 S. Clark St., Suite 4, Forest City, IA 50436
Official websiteCounty notes
- Tax sale material for this county lives on the Iowa County Treasurers eGovernment site at https://www.iowatreasurers.org/index.php?module=treashome&idCounty=95, not on the county's own domain. The redesigned county site at winnebagocountyiowa.gov carries the Treasurer's contact details and hours but had no tax sale section when checked in July 2026.
- The two official 2026 notices disagree on the room location: the Notice to Tax Sale Purchasers places the Supervisors' Board Room on the first floor of the courthouse, while the published sale notice places it on the second floor. Bidding is online either way, so confirm with the office only if you plan to attend in person.
- Office contacts as posted by the Treasurer: Treasurer Julie Swenson, tax department 641-585-2322, fax 641-585-1059, email julie.swenson@winnebagocountyiowa.gov, hours Monday through Friday 8:00 a.m. to 4:30 p.m.
Iowa rules
- 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.
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.
Frequently asked questions
Does Winnebago County, Iowa sell tax liens or tax deeds?
When is the Winnebago County tax certificate sale?
How often does Winnebago County hold tax deed sales?
I own a property in this sale. Can I stop it?
Where can I find the Winnebago County tax sale list?
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.
Browse all 99 Iowa counties
Compare sale calendars, platforms, and rules across the state, or read the guides before you bid.