This site has been prepared by the Sublette County Assessor’s Office to help property owners better understand the functions of the Assessor’s Office and provide information on what tax relief programs are available, how property tax is determined, how real property is assessed, what personal property a business should declare, and much more. Please check out the links on the left for more information.


The goal of the Assessor’s Office is to assist the taxpayer in an efficient, knowledgeable, and friendly manner. We strive to provide accurate information and will always make the service we provide to the citizens of Sublette County our top priority. If you have any questions regarding the value of your property or the valuation process, the Assessor’s Office is always ready to assist and serve you.

Duties & Responsibilities

It is the statutory duty of the Assessor’s Office to locate, identify, and value all taxable property (real property and personal property used by businesses) in Sublette County as of January 1 of each year. The Assessors are mandated and prescribed by State law on how and when assessments are performed.

The Assessor strives to value properties accurately, fairly, and uniformly according to guidelines from Wyoming Statutes and the Wyoming Department of Revenue.

The Assessor’s Office maintains property information including maps, legal descriptions, owner information, and improvement details. In addition, the Assessor’s Office maintains a property file and property card on every parcel of land that is not exempt.

The Assessor does not establish the dollar amount of taxes nor does the Assessor bill or collect taxes. The voting taxpayers, County Commissioners, State limitations, and assessed values determine the tax rate for each of the 10 tax districts in Sublette County. The County Treasurer is responsible for billing and collecting taxes. Building permits are issued by the Sublette County Planning and Zoning Office and the Towns of Pinedale, Big Piney, and Marbleton.

2023 Property Review Schedule

In addition to sale reviews, building permit reviews and building progress reviews, we will be visiting the following areas in 2023.

  • Area2
  • Pinedale 4

View maps of these areas (PDF)

Important Information to Ranchers

Agricultural lands are valued based upon their capacity to produce income. Annually, the Wyoming Department of Revenue (DOR) receives data about the market price of hay and the lease rate for grazing lands. Then, by weighing a five-year average of those prices and by utilizing income formulae, they determine and issue to the local assessor, a range of values per acre for different soil types. I have selected the lowest possible value from each range category. The 2020 value for irrigated land went up by about 3.4%. Dry crop lands decreased by roughly 3.2%, with rangeland deceasing 1%.  Please keep in mind that agricultural lands in Sublette County are consistently sold for far more than their productive value. Therefore, even with the increases in values, the taxes are still much lower than if the land were valued at fair market value.

For more information about the method of determining ag land values, please visit the Department of Revenue Property Tax Division website Agricultural page.

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View the Online Questionnaire.