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Tax Sale Atlas

Union County, AR tax sales

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

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

Announcements
The collector publishes the delinquent list in the local newspaper in late November or early December each year.
Format
County site
County office
(870) 864-1930
Every displayed fact carries a source badge. Verified Aug 22, 2026 against official county and state pages.How we verify
On this page

How Union County sells delinquent taxes

No tax lien certificate sale

Arkansas sells no tax lien certificates to investors, and Ark. Code Ann. 26-37-101(a)(2) states that tax-delinquent lands shall not be sold at the county level.

Tax deed sale

Online auction
Run by
Arkansas Commissioner of State Lands
Frequency
annual
Sale list
Union County Public Auction Catalog
When it runs
The current Public Auction Catalog lists Union County for "9/22/2026 10:00:00 AM" at the El Dorado Conference Center, Murphy Hall III, 311 S. West Ave, El Dorado. Union parcels are sold in a regional session shared with Columbia and Calhoun counties, so a single bidding room covers all three. Statewide auction dates run from July through September and every session opens at 10:00 a.m. Central.
Registration and deposit

Registration opens one hour before the 10:00 a.m. sale at the auction site and costs nothing. Fill out a numbered bidder registration card, hand it to a Commissioner of State Lands employee and keep the opposite half as your bidder number. Parcels are called in sale-number order from the catalog, and the minimum bid is the taxes, interest, penalty and costs due as of the sale date. Winning bidders pay in full immediately after the auction by personal or business check, cashier's check, money order, or credit or debit card. Cash is not accepted, and card transactions carry a 4% non-refundable processing fee charged by the terminal provider. Bidding on unsold parcels later at auction.cosl.org requires an online account and a card on file: the first $100 per parcel is charged to that card and the full balance is due within 10 days of the auction's close.

Sale format and venue
Union County holds no tax sale of its own. The county collector bills the taxes, publishes the delinquent list, and certifies parcels that stay unpaid for two years to the Commissioner of State Lands, who auctions them for all 75 Arkansas counties. Union is one of the counties whose regional auction is hosted in its own seat, so Union parcels are sold in El Dorado alongside Columbia and Calhoun county parcels. The auction itself is live and in person; there is no online bidding on the initial offering. Parcels that draw no bid are offered online at auction.cosl.org beginning 30 days after the live sale. Redemption closes at 4:00 p.m. Central on the last business day before the sale date, and there is no redemption period after the hammer falls. The state conveys a limited warranty deed, which transfers only the interest the state holds and works much like a quitclaim, so title work before bidding is on the buyer. City liens, improvement district assessments and property owner association fees commonly survive the sale and become the new owner's responsibility, and IRS liens carry their own federal redemption rights.
Register on Online auction

Union County tax sale list and auction calendar

For Union 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 Union County Public Auction Catalog 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

    Bidding runs on County site; check posted sale dates, registration status, and bidding windows there.
  4. Confirm with the office

    If the list, platform, and notice disagree, use Arkansas Commissioner of State Lands as the source to confirm which parcels are actually offered.

Before you bid in Union County

  1. Start with the live sale list

    Pull the current advertised parcels from Union County Public Auction Catalog. Lists can change before the sale, so recheck the county source before you price a parcel.
  2. Confirm registration and deposit

    Registration opens one hour before the 10:00 a.m. sale at the auction site and costs nothing. Fill out a numbered bidder registration card, hand it to a Commissioner of State Lands employee and keep the opposite half as your bidder number. Parcels are called in sale-number order from the catalog, and the minimum bid is the taxes, interest, penalty and costs due as of the sale date. Winning bidders pay in full immediately after the auction by personal or business check, cashier's check, money order, or credit or debit card. Cash is not accepted, and card transactions carry a 4% non-refundable processing fee charged by the terminal provider. Bidding on unsold parcels later at auction.cosl.org requires an online account and a card on file: the first $100 per parcel is charged to that card and the full balance is due within 10 days of the auction's close.

  3. Check the state rules that change the bid

    Read the Arkansas 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

Thirty calendar days after the live auction, every parcel that drew no qualifying bid moves to the Commissioner's online unsold-property auction and stays there until it sells, is redeemed, or is withdrawn. Nothing is priced over a counter: the first online bid starts a 30-calendar-day auction period that closes at 8:00 p.m. Central on the thirtieth day, other registered bidders may outbid during it, and the Commissioner mails the owner and interested parties notice when the first bid arrives. Within two years of the live auction the reserve stays at the taxes, penalty, interest, fees and costs; two years or more after it, the Commissioner may negotiate a price he determines is in the best interest of the state and the local taxing units. Online bidders must pass an identity check as a United States resident and keep a card on file; the winner's card is charged $100 in earnest money immediately and the balance is due in certified funds within 10 business days.

Commissioner of State Lands post-auction sales (search by county)

New to this path? Read how over-the-counter purchases work.

Use the arrow keys to switch between these sections.

County offices

Tax sale office

Union County Tax Collector

(870) 864-1930

101 North Washington, Room 106, El Dorado, AR 71730-5661

Official website

County notes

  • Union County taxes are delinquent after October 15, or the next business day when that date falls on a weekend. Real estate and mineral interests accrue penalty and interest monthly until paid.
  • The collector publishes the delinquent list in the local newspaper in late November or early December each year. That list is the earliest public look at parcels heading toward certification.
  • Certified parcels are advertised once more in the local newspaper between January and June, and are forwarded to the Commissioner of State Lands 30 days after that publication date. Real estate and producing mineral interests reach the state after two years of unpaid taxes.
  • Delinquent balances owed to the collector must be paid by cash, cashier's check or money order. Personal checks are not accepted on delinquent taxes.
  • The collector's office is in the Union County Courthouse at 101 North Washington, Room 106 in El Dorado, open Monday through Friday from 8:00 a.m. to 4:30 p.m.
  • For redemption amounts and sale questions on parcels already certified to the state, contact the Commissioner of State Lands at 501-324-9422 or [email protected] rather than the county.
  • Parcel research starts in the Public Auction Catalog: clicking a parcel number in the catalog opens the county assessor's property card for that parcel.

Arkansas rules

Redemption
The clock is long even though the deadline is hard. The county collector holds the delinquent land for one year after the October 15 delinquency date, certification to the Commissioner of State Lands follows no later than July 1 of the next year, and the sale date must be no earlier than one year after certification, so an owner normally has more than two years from the missed payment. What the owner does not get is any post-sale window. The Commissioner's office states that, effective July 1, 2023, parcels sold through its office cannot be redeemed and all sales are final, at live auctions and through the online unsold-property auction alike. Payment has to be received by the 4:00 p.m. deadline; postmarks are not accepted. A quoted redemption figure holds for 30 days unless the parcel sells, the county amends its records, or further costs accrue.
Deed deposit
There is no statutory bidder deposit at the live auction and no registration fee. Registration opens one hour before the sale at the sale site against a photo ID and a driver's license number, and the successful bidder tenders the full purchase price at the time of the sale. The online unsold-property auction works differently: registration requires identity verification and a card on file, and the winning bidder's card is charged $100 in earnest money immediately on notification.
Surplus proceeds
Money above the taxes, fees, penalties, interest and costs due at the time of sale is excess proceeds. Within one year of receipt the Commissioner pays penalties, collection fees and sale costs to his own office and the delinquent taxes, interest and costs to the county. The remainder is held for one year from the date of the limited warranty deed, then applied on application to delinquent personal property taxes, state tax certificates of indebtedness and delinquent solid waste assessments. Of whatever is left, 10 percent up to a maximum of $500 goes to the Commissioner for administering the distribution and the rest is payable to the former owner on a complete claim packet. Excess proceeds are held two years and then escheat by operation of law to the county. A former owner, part owner or interested party who buys the parcel at the tax sale is not entitled to any distribution, and a third-party recovery agent's fee may not exceed 10 percent.
Governing statute
Ark. Code Ann. Title 26, Chapter 37

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 Arkansasrules and every county →

Frequently asked questions

Does Union County, Arkansas sell tax liens or tax deeds?

Tax deeds. Arkansas sells no tax lien certificates to investors; the Commissioner of State Lands sells the property itself at a public tax sale.

How often does Union County hold tax deed sales?

Union 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. Arkansas's redemption rule: Until 4:00 p.m. Central time on the last business day before the sale date. There is no redemption after the sale. Call the Arkansas Commissioner of State Lands 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 Union County tax sale list?

Union County posts its tax sale list at cosl.org. 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 Aug 22, 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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