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Tax Sale Atlas

Winnebago County, WI tax sales

Tax Sale Atlas maps the Winnebago County, WI tax sale, one of 2,862 counties in 36 states. Wisconsin sells the deed itself, so no statutory investor interest rate applies. Sale office, calendar and list locations read from state rules plus what the county publishes on Sep 11, 2026.

How tax deed sales work in Winnebago County, seat of Oshkosh: sale calendar, auction platform, over-the-counter lists, and the offices that run each sale.

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

Announcements
Winnebago County publishes no standing list of tax deeded parcels.
Format
County site
Registration
There is no online bidder portal and no standing registration.
County office
920-232-3420
Every displayed fact carries a source badge. Verified Sep 11, 2026 against official county and state pages.How we verify
On this page
Look up a sale detail

Winnebago County Treasurer. Varies by county: Wisconsin Surplus Online Auction, a sealed bid filed with the county treasurer or county clerk, a listing with a licensed real estate broker or on a multiple listing service, or a live public auction at the county building. annual

Record quality: medium. Last verified: 2026-09-11.

Tax Foreclosed Property, Winnebago County Treasurer (source accessed 2026-09-11)

Recorded reference information. Verify current sale conditions with the county. Read the full sale details.

Link to this detail

How Winnebago County sells delinquent taxes

No tax lien certificate sale

Wisconsin counties sell no tax lien certificates to investors. Under s. 74.57(1) the county treasurer issues the tax certificate to the county itself, and s. 74.57(3) states that the county may not sell, assign, or otherwise transfer it. The section carries two carve-outs, and neither admits a bidder: a county may sell its right to receive tax certificate revenues under s. 74.635, which is a payment stream rather than a lien, and the county treasurer must reissue certificates to a city acting under s. 74.87 that has paid the delinquent taxes under an agreement made under s. 74.83.

Tax deed sale

Varies by county: Wisconsin Surplus Online Auction, a sealed bid filed with the county treasurer or county clerk, a listing with a licensed real estate broker or on a multiple listing service, or a live public auction at the county building
Run by
Winnebago County Treasurer
Frequency
annual
Registration
There is no online bidder portal and no standing registration.
Sale list
Tax Foreclosed Property, Winnebago County Treasurer
When it runs
The Treasurer's tax foreclosed property page states that "auctions are typically held in December and the first part of any given year." No sale month is fixed by statute. Winnebago County General Code 3.03(2)(g) requires the Treasurer to publish a parcel's availability and its appraised value within 180 days of the county acquiring it, so offerings follow acquisitions rather than an annual calendar.
Registration and deposit

There is no online bidder portal and no standing registration. Winnebago County runs a notification list instead: submit the Treasurer's tax foreclosed property signup form at https://winnebagoco.form.transform.civicplus.com/56224 to be alerted when parcels become available. The county purges that list after every auction notice, so re-submit the form after each sale to stay on it. Bid form, deposit and deadline come with each offering notice; call the Treasurer at 920-232-3420 for the current package.

Sale format and venue
This is a county-owned land sale, not a lien sale. Winnebago County takes title through in rem tax foreclosure and then resells under Wis. Stat. 75.35, 75.36 and 75.69. The county board has delegated the power to acquire, manage and sell tax deeded land to the County Treasurer under General Code 3.03(2)(b). The Treasurer is authorized to sell by open or closed bid or to engage a licensed real estate broker, so there is no online auction platform: bids go to the Treasurer's office or, when a parcel is listed with a broker, through that listing. The county board's Personnel and Finance Committee sets the appraised value within 120 days of acquisition, and the Treasurer notifies the clerk of the municipality where the parcel sits at least three weeks before the sale.
Register on Varies by county: Wisconsin Surplus Online Auction, a sealed bid filed with the county treasurer or county clerk, a listing with a licensed real estate broker or on a multiple listing service, or a live public auction at the county building

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. If the parcels on this list are vacant land rather than houses, what buying land at a tax sale hands you is the place to start.

  1. Get the advertised list

    Use Tax Foreclosed Property, Winnebago County Treasurer for the current advertised parcels, then recheck it before the auction.
  2. Register to bid

    There is no online bidder portal and no standing registration. Full requirements are in the sale card above.
  3. Sale day

    Bidding runs on Wisconsin Surplus Online Auction, the shared platform many Wisconsin counties use for tax delinquent real estate; check posted sale dates, registration status, and bidding windows there.
  4. Confirm with the office

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

Before you bid in Winnebago County

  1. Start with the live sale list

    Pull the current advertised parcels from Tax Foreclosed Property, Winnebago County Treasurer. Lists can change before the sale, so recheck the county source before you price a parcel.
  2. Confirm registration and deposit

    There is no online bidder portal and no standing registration. Winnebago County runs a notification list instead: submit the Treasurer's tax foreclosed property signup form at https://winnebagoco.form.transform.civicplus.com/56224 to be alerted when parcels become available. The county purges that list after every auction notice, so re-submit the form after each sale to stay on it. Bid form, deposit and deadline come with each offering notice; call the Treasurer at 920-232-3420 for the current package.

  3. Check the state rules that change the bid

    Read the Wisconsin due-diligence checklist before bidding. Redemption, liens that survive a tax deed, title cleanup, and payment deadlines can change what a parcel is worth. Which liens survive is state law, so read what survives a tax deed in Wisconsin before you price the title work.
  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

Wisconsin has no statewide over-the-counter program at a fixed statutory price, and no state-held certificate to assign. County inventory is what stays for sale. The county board may sell its tax-deeded lands on whatever terms it sets, may hire licensed real estate brokers on commission, and may advertise on a multiple listing service, so a county parcel can sit on the open market between sales. Once a parcel has been advertised and not sold, the county may sell it for any amount after a further class 1 notice, subject to board or committee approval below the appraised value. Ask the county treasurer or the land committee for the current list of unsold county-owned parcels and make a written offer. Approval still runs through the board or its committee, so nothing closes on the day.

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

Use the arrow keys to switch between these sections.

County offices

Tax sale office

Winnebago County Treasurer

920-232-3420

112 Otter Ave, Room 116, Oshkosh, WI 54901 (mailing: P.O. Box 2806, Oshkosh, WI 54903-2806)

Official website

County notes

  • Winnebago County publishes no standing list of tax deeded parcels. Parcels appear on the Treasurer's tax foreclosed property page only while an offering is open, and each offering is separately advertised within 180 days of the county taking title, either by a class 1 notice in the official county newspaper or on a multiple listing service. Between offerings there is genuinely nothing to list, which is why the page can sit empty for months.
  • First offering floor: at the first attempt to sell a parcel, every bid below the appraised value set by the Personnel and Finance Committee must be rejected (General Code 3.03(2)(i)). A parcel that does not sell may later be re-offered for any amount the committee approves, but only after a fresh class 1 notice under Wis. Stat. ch. 985. The county may also reject the high bid, in which case the committee must publish a written statement explaining why.
  • Some parcels never reach the open market. A former owner of an owner-occupied single-family residence, or that owner's heir or beneficiary, has 45 days after the county takes title to give notice of intent to repurchase, and a municipality or the state may claim a parcel within 60 days by paying no less than the appraised value or the county's investment, whichever is greater.
  • Wisconsin sells no tax lien certificates to investors. The September 1 tax certificate under Wis. Stat. 74.57 is issued to the county itself and cannot be assigned, and the in rem judgment vests title in the county with no bidder. The only event an outside buyer can act on in Winnebago County is the Treasurer reselling land the county already owns by tax deed.

Wisconsin rules

Redemption
The redemption right in Wisconsin runs against the county, and it is over before an investor sees the parcel. Issuance of the tax certificate on September 1 starts the clock. Two years later the county may take its deed or start a foreclosure, but the right to redeem does not end on that anniversary: under s. 75.01(1)(b) any person may redeem at any time before the tax deed is presented to the register of deeds and accepted for record, and a redemption before recording makes the deed void as to the land redeemed. On the in rem route under s. 75.521 the county publishes a notice fixing the last day for redemption at least 8 weeks after first publication, and an interested party may instead serve a verified answer within 30 days after that date on the three grounds the section allows. Once the deed is recorded or judgment is entered, redemption is finished. Between the two, at least 6 and not more than 10 months before the redemption period expires, the county treasurer must publish a class 2 notice listing every unredeemed parcel with its amount due and the last day of redemption, which is the public list an investor can watch. Two things can still pull a parcel off a sale list afterward: the minor and incompetency extension in s. 75.03, and the former owner repurchase right in s. 75.35(3).
Deed deposit
Wisconsin fixes no statutory deposit. Section 75.35(2)(am) lets the county board sell its tax-deeded lands in whatever manner and on whatever terms it sets by ordinance or resolution, and s. 75.35(2)(d) lets the board delegate that power to a committee, an officer or a department, or hire licensed real estate brokers on commission. Deposits are county rules, not state law. St. Croix County requires a 10 percent deposit by cashier's check or money order with each sealed bid and rejects personal checks. Counties selling through the statewide online auctioneer instead take payment by certified check or wire transfer under the platform's terms. Read the county's own bid packet before you bid.
Homestead deeds
Owner-occupied homes are treated differently, and the difference can pull a parcel off the list. For single-family, owner-occupied properties the county board must by ordinance give the former owner who lost title, or that person's heirs or beneficiaries, the right to buy the land back before it is sold, on paying the costs and expenses under s. 75.36(3)(a), the property taxes that would have been owed for the year of the purchase, and enough to satisfy any other liens at the time of foreclosure plus the county's repurchase costs. The board may extend the same right to other property types at its option. A sale under that ordinance is exempt from s. 75.69 altogether, so it never reaches a public bid. Counties set their own window. Dane County gives the former owner 60 days from delivery of the treasurer's certified-mail notice. Treat an owner-occupied house on a Wisconsin land sale list as provisional until the repurchase window has closed.
Surplus proceeds
Wisconsin returns the surplus to the former owner, and the county treasurer has to go find them. On taking the tax deed the treasurer must notify the former owner by registered or certified mail, at the mailing address on the tax bill, that the former owner may be entitled to a share of the proceeds of a future sale. When the county sells, the treasurer computes net proceeds by subtracting foreclosure, record-keeping, legal, advertising and title insurance costs, the actual maintenance, board-up, clean-up and demolition costs reasonably needed to sell, real estate agent or broker fees, and all unpaid general property taxes, interest, penalties, special assessments, special charges and special taxes. From the net proceeds the treasurer pays any managed forest withdrawal tax and fee, then the taxing jurisdictions' special assessments and special charges, prorated if the money runs short. Anything still remaining goes to the former owner, less any delinquent taxes, interest and penalties that person owes the county on other property. A payment unclaimed one year after mailing becomes unclaimed funds under s. 59.66(2), and no interest is paid on any of it.
Governing statute
Wis. Stat. ch. 74

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 Wisconsinrules and every county →

Frequently asked questions

Does Winnebago County, Wisconsin sell tax liens or tax deeds?

Tax deeds. Wisconsin sells no tax lien certificates to investors; the County Board of Supervisors sells the property itself at a public tax sale.

How often does Winnebago County hold tax deed sales?

Winnebago County holds its tax deed sale once a year. 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. Wisconsin's redemption rule: 2 years from the September 1 the tax certificate was issued, before the county takes title; 1 year where municipal razing costs are included in the amount due, or where the certificate is held by a county of 750,000 or more or by a 1st class city collecting its own taxes. Call the Winnebago 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 Winnebago County tax sale list?

Winnebago County posts its tax sale list at winnebagocountywi.gov. 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 Sep 11, 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.

Call Winnebago County Treasurer