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Tax Sale Atlas

Natrona County, WY tax sales

Tax Sale Atlas maps the Natrona County, WY tax sale, one of 2,957 counties in 40 states. Wyoming sells tax lien certificates paying up to 15%, redeemable for 4 years minimum. Sale office, calendar and list locations read from the county’s own official pages on Sep 26, 2026.

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

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

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Natrona County Treasurer. annual

Record quality: high. Last verified: 2026-09-26.

Tax Sale Registration 2026, Natrona County Treasurer (source accessed 2026-09-26)

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

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How Natrona County sells delinquent taxes

From lien to deed

Wyoming holds no county tax deed auction. A certificate holder whose certificate is not redeemed may apply to the county treasurer for a tax deed not less than four nor more than six years after the original sale, returning the certificate, paying the 25 dollar deed fee and proving notice. At least three months before applying, the holder must serve written notice on every person in actual possession or occupancy and on the person the property was taxed to, if they can be found in the county; if nobody occupies the property and the taxpayer cannot be found, the holder instead publishes the notice once a week for three weeks in a county newspaper, the first publication not more than five months and the last not less than three months before applying. Either way the holder must also send notice by certified or registered mail to the record owner and any mortgagees whose addresses are known. The notice states when the holder bought, the name the parcel was taxed in, its description, the tax year, when redemption expires, when the deed application will be made, and any special assessments. Where the county itself holds an unredeemed certificate, the treasurer issues and records a tax deed to the county after four years, following at least 60 days' notice from the county clerk to the person assessed and any mortgagees. The published notices of intent to apply are not sales.

Tax certificate sale (lien)

Run by
Natrona County Treasurer
Frequency
annual
Sale list
Delinquent Real Property Report for 2025 (PDF)
When it runs
Held once a year, which the Treasurer describes as "normally held at the end of August or beginning of September." In 2026 the lottery was drawn in the Treasurer's Office on September 3, 2026, and winners had until 5:00 pm that day to accept or decline their parcels.
Registration and deposit

Register through the Treasurer's online tax sale application, which opens each summer and closes before the sale; registration for 2027 opens in summer 2027. Anyone 18 or older may take part. Each bidder needs a current W-9 and a unique Social Security number or corporate ID, so only one person can bid for a business. Each registrant gets one number and may reserve up to 10 extra numbers at $20 each. Give a working phone and email: the office calls in the days before the sale to collect extra-number fees and emails each drawn number its parcel list, and a number that does not respond by 5:00 pm on sale day forfeits its parcels. Pay by mail, by phone (card fees apply) or at the office. Certificates of purchase are not issued until the Treasurer has your W-9.

Sale format and venue
Natrona County allocates parcels by lottery in the Treasurer's Office, not by open bidding and not on an online auction platform. The price of each certificate is fixed and listed on the published list: the delinquent tax, advertising fees and a certificate fee. On redemption the holder receives the amount paid plus a 3 percent penalty and 15 percent a year. The owner may redeem for four years from the sale; after four years the holder may apply for a tax deed after sending certified notice to the owner of record three months before applying, and loses the right to apply six years after the sale. Up to $250 of documented deed-notice expenses can be added to the redemption amount by filing a notarized Affidavit of Expense. The holder should call the office each October for the current-year taxes, since unpaid years go to the next tax sale. A certificate can be reassigned at least one month after the sale for $20 per assignment. The delinquency list is posted as a PDF on the Treasurer's tax sale page and is also advertised in the newspaper for three weeks before the sale.
Source: Tax Sale Registration 2026, Natrona County Treasurer· Verified Sep 26, 2026

Natrona County tax sale list and auction calendar

For Natrona 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 Real Property Report for 2025 (PDF) for the current advertised parcels, then recheck it before the auction.

  2. Register to bid

    Ask the county office how and when to register; many counties close registration days or weeks before the sale.

  3. Sale day

    The auction platform is still being verified. Confirm the next sale date and registration window with the county before you bid.

  4. Confirm with the office

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

Before you bid in Natrona County

  1. Start with the live sale list

    Pull the current advertised parcels from Delinquent Real Property Report for 2025 (PDF). Lists can change before the sale, so recheck the county source before you price a parcel.

  2. Confirm registration and deposit

    Register through the Treasurer's online tax sale application, which opens each summer and closes before the sale; registration for 2027 opens in summer 2027. Anyone 18 or older may take part. Each bidder needs a current W-9 and a unique Social Security number or corporate ID, so only one person can bid for a business. Each registrant gets one number and may reserve up to 10 extra numbers at $20 each. Give a working phone and email: the office calls in the days before the sale to collect extra-number fees and emails each drawn number its parcel list, and a number that does not respond by 5:00 pm on sale day forfeits its parcels. Pay by mail, by phone (card fees apply) or at the office. Certificates of purchase are not issued until the Treasurer has your W-9.

  3. Check the state rules that change the bid

    Read the Wyoming 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

Parcels that no one buys at the sale are bid in for the county. The board of county commissioners may sell and assign those county-held certificates at public or private sale at any time, and the assignee takes all the rights of an original purchaser. Whether a county offers them over the counter, and at what price, is set by that county; ask the county treasurer.

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

Use the arrow keys to switch between these sections.

County offices

Tax Collector (runs the certificate sale)

Natrona County Treasurer (Property Tax)

307-235-9470

200 N. Center St., Room 130, Casper, WY 82601; mailing: P.O. Box 2290, Casper, WY 82601

Official website

County notes

  • The Natrona County tax sale is a lottery run in the Treasurer's Office, not an auction: certificates sell at the listed delinquent amount, and registered numbers are drawn to allocate parcels.
  • Watch for the Treasurer's call or email in the days before the sale. A drawn number that does not accept its parcel list by 5:00 pm on sale day forfeits those parcels.

Wyoming rules

Max interest rate
15% per year, fixed by statute (nothing is bid)
Minimum return
3% one-time penalty at redemption, added on top of the interest
Redemption
The legal owner may redeem at any time after the sale until a valid tax deed application has been filed with and accepted by the county treasurer. Because the treasurer cannot accept an application until four years after the sale, every owner has at least four years; after that the window stays open until the holder applies, and the holder must apply by the sixth year or lose the deed route. Redemption money is paid to the county treasurer, who holds it for the certificate holder, issues a certificate of redemption and notifies the holder. Where the county holds the certificate, the treasurer deeds the parcel to the county after four years. Where the holder instead forecloses in district court, anyone with an interest in the property may redeem until the court confirms the sheriff's sale.
Surplus proceeds
The treasurer's deed route conveys the parcel to the certificate holder, and nothing in Chapter 13 provides for paying the former owner any value above the certificate. On the judicial route, proceeds go first to the costs of the action and sale, including an attorney's fee allowed by the court, then to the lienholder, and the balance to persons holding prior interests in the property as their interests appear. That balance must be claimed within two years of the court's confirmation of the sale, or within one year after a legal disability ends, and unclaimed money is credited to the county sinking fund. No deficiency judgment may be entered.
Governing statute
W.S. Title 39, Chapter 13

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 Wyomingrules and every county →

Frequently asked questions

Does Natrona County, Wyoming sell tax liens or tax deeds?

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

When is the Natrona County tax certificate sale?

Held once a year, which the Treasurer describes as "normally held at the end of August or beginning of September." In 2026 the lottery was drawn in the Treasurer's Office on September 3, 2026, and winners had until 5:00 pm that day to accept or decline their parcels. Always confirm the exact date with the County Treasurer before the sale.

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

Often yes, by paying the overdue taxes, interest, and costs before the deadline. Wyoming's redemption rule: At least 4 years from the sale; the right ends when a valid tax deed application is filed and accepted, which can happen from 4 to 6 years after the sale. Call the Natrona 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 Natrona County tax sale list?

Natrona County posts its tax sale list at natronacounty-wy.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 26, 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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Wyoming tax salesDue diligence guide
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