2021 Tax Sale Information

Our tax sale for 2020 tax year will be held August 5, 2021.  The sale will be held at the Green River High School Auditorium.  The doors will open at 8:00 a.m. and the sale will start at 9:00 a.m.

      Everyone attending must Pre-Register themselves and anyone that will be
      bidding for them.  We WILL NOT be registering anyone or additional bidders at

      the sale.  We will need to have your completed paperwork back to us before
      the tax sale.

We are accepting payment at the tax sale only and will not be taking payment at the office after the sale.  Please bring a check with you to the sale.

If you have been to a previous tax sale we do not need a new W-9 filled out.  If you are a new participant please fill out both the Pre-Registration form and the W-9.

Tax Sale Pre-Registration Form
W-9 Form

Please fill out the attached form(s) and mail them back to our office at: 

Sweetwater County Treasurer
80 W Flaming Gorge Way Ste 139
Green River, WY 82935 

Or you can email it to or 

Responsibilities & Services

The Sweetwater County Treasurer’s Office receives all revenues belonging to the county. Major duties are tax collector and head of the treasury. Other responsibilities charged to the treasurer are disbursing payments for county obligations on county warrants and investing unencumbered funds in accordance with the County Investment Policy.

The office has two major sections, Ad Valorem Tax (also known as property tax) and motor vehicles. The Ad Valorem Tax section is responsible for the billing and collection of commercial, residential, and personal property taxes. The motor vehicle section issues license plates and collects sales tax on motor vehicles. The staff of the Treasurer’s Office is cross trained for better efficiency to help serve the residents of Sweetwater County.

Payment Information

  • Cash, check, and money order are accepted.
  • Paying with a credit or debit card will incur a small convenience fee (processed with Point and Pay Payments).

The information that is supplied by the Sweetwater County Treasurer’s and the Sweetwater County Assessor’s Office is public information and must be used with the understanding that the data was collected for the use and purpose of determining property tax information and property assessments. Neither the Sweetwater County Treasurer’s Office nor the Sweetwater County Assessor’s Office will be held liable as to the validity, correctness, accuracy, completeness, and/or reliability of this data. The Sweetwater County Treasurer’s Office and the Sweetwater County Assessor’s Office assume no liability whatsoever associated with the use or misuse of this public information.

Neither Sweetwater County, the Sweetwater County Treasurer’s Office , or any officer or employee of the Treasurer’s Office, warrants the accuracy, reliability, or timeliness of any information in the Public Access System and shall not be held liable for any losses caused by such reliance on the accuracy, reliability, or timeliness of such information. Portions of such information may be incorrect or not current. Any person or entity that relies on any information obtained from the system does so at his or her own risk.

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Robb Slaughter
County Treasurer
80 W Flaming Gorge Way
Suite 139
Green River, WY  82935
Phone: (307) 872-3720
              (307) 922-5402
Fax:       (307) 872-3998
Office Hours
Monday-Friday 8:00 am - 5:00 pm