Every one of Wyoming's 23 counties elects its own assessor, and that person decides how local homes, ranches, businesses and equipment are valued for property tax. Whether you own a house in Cheyenne, a cattle operation outside Lusk or a condominium in Jackson, one county office holds your parcel record. This page explains how assessor services are organized across Wyoming, how the offices differ between energy towns, resort areas and ranch country, and how to reach the right one without wasted trips.

How Property Valuation Is Organized Across Wyoming

Wyoming has no single statewide assessor's office. Valuation is a county job, performed by an assessor who is an elected county officer serving a four-year term. The assessor works from the county seat, usually inside or near the courthouse. That office keeps the parcel maps, ownership records and valuation files for every taxable property in the county.

The state still plays a supervisory part. The Wyoming Department of Revenue sets valuation standards, publishes appraisal manuals, trains county staff and reviews the quality of local work. It also assesses certain property directly, including mineral production and centrally assessed utilities and pipelines that cross several counties. That is why a gas field or a transmission line may not appear in your county assessor's residential files at all.

Under the statutes in effect when this page was prepared, property is valued as of January 1 and taxed at a percentage of fair market value. Residential and commercial property is assessed at 9.5 percent, while industrial property is assessed at 11.5 percent. The legislature has adjusted property tax rules in recent years, so confirm current ratios and exemptions with your county office before relying on any figure.

Three different offices shape a Wyoming property tax bill, and people often confuse them. The assessor values the property. Local taxing bodies, such as the county, school district and city, set the mill levies. The county treasurer sends the bill and collects the money. Taxes are payable in two halves, with the first half delinquent after November 10 and the second after May 10.

What a Wyoming County Assessor's Office Actually Does

When you walk into an assessor's office anywhere in the state, you can expect help with a fairly consistent set of tasks:

The assessor does not set tax rates, collect payments or decide appeals. If you disagree with a value, start with a conversation at the assessor's office. Bring your notice and ask to see the sales or cost data behind your number. Many disputes end there, after a correction to square footage, condition or a building that no longer exists.

If the conversation does not settle things, the next step is the county board of equalization, which in Wyoming is made up of the county commissioners. A further appeal goes to the State Board of Equalization, an independent state body. Appeal windows are short, so read the deadline printed on your notice and act promptly.

Energy Counties, Resort Counties and Ranch Counties: How Wyoming Offices Differ

Wyoming's population is small and spread over a huge area, so the experience at an assessor's office depends heavily on the county. Three broad patterns stand out, and a fourth group sits in between.

Energy-producing counties

In Campbell County, where Gillette sits at the center of Powder River Basin coal country, and in Sweetwater County, home to Green River and the trona industry, the assessor deals with large industrial parcels, housing that rises and falls with employment, and heavy commercial equipment. The same is true in Natrona County, where Casper has long served as the state's oil and services hub. Much of the mineral value is assessed by the state, but the surrounding housing and business property is assessed locally, and values can move quickly when production changes. Sublette County in Pinedale and Converse County in Douglas see similar swings.

Resort and high-value counties

Teton County is the clearest example. The assessor's office at 200 South Willow Street in Jackson handles some of the highest-priced real estate in the state, along with many second homes and seasonal rentals. Owners there often need detailed explanations of how land and improvements were valued. Park County, with its office on Sheridan Avenue in Cody, and Sheridan County, which serves the city of Sheridan from South Main Street, also see steady tourism and lifestyle-driven ownership.

Ranch and small-town counties

Niobrara County in Lusk, Crook County in Sundance, Weston County in Newcastle, Hot Springs County in Thermopolis and Washakie County in Worland run lean offices with small staffs. Agricultural classification, large rural parcels and acreage corrections dominate the workload. Phone ahead, because the person who knows your parcel may also be covering several other duties.

Capital, university and reservation counties

Laramie County, which includes the capital city of Cheyenne, and Albany County, home of the University of Wyoming in Laramie, sit between these extremes. Their offices see more routine residential, rental and new-construction activity. Fremont County in Lander adds another wrinkle: parts of the county lie within the Wind River Reservation, and whether land is held in trust or as fee land affects whether the county can tax it. Ask the assessor about the status of a specific parcel.

Finding and Contacting the Right Assessor Office in Wyoming

Because Wyoming assessors are organized by county, the first step is to know which county your property is in, not which city. A mailing address can mislead. Some Wyoming towns sit close to county lines, and rural addresses may belong to a different county than the post office suggests. Your deed, tax bill or notice of assessment names the county.

Each county in our directory lists one assessor office with an address and a phone number. Carbon County lists a post office box in Rawlins, so call 307-328-2637 to confirm where to go in person. The Crook County office in Sundance appears simply as County Assessor, at 309 East Cleveland Street.

What to bring and when to go

Bring the parcel number or street address, a photo ID, and any deed or closing statement for a recent purchase. For an appeal, add your notice of assessment, photos of defects, repair estimates and any independent appraisal. Call first for office hours, since they vary by county. Try to visit in the weeks after notices go out, when staff expect questions, and avoid waiting until the deadline.

Your next step is simple: pick your county from the listings below, call the office, and ask for the parcel number and the date of the last valuation before you make the drive. In a state where the next county seat can be an hour or more away, that one call often saves an afternoon.

Property assessor offices in Wyoming operate under state property tax statutes that specify how properties must be valued, how often reappraisals occur, and what exemptions are available to qualifying homeowners. The state department of revenue or taxation typically provides oversight and technical guidance to county assessors to ensure consistent valuation practices statewide.

Assessor locations are available in 23 cities across Wyoming. They are spread across 23 counties.

Cities with the highest concentration include Buffalo, Gillette, Basin, where high real estate activity and complex commercial properties create greater demand for assessor services and property valuation resources.

Property owners in Wyoming should verify that their primary residence homestead exemption is active and confirm the annual appeal deadline with their local assessor office, as missing the deadline means waiting until the following tax year to contest a valuation.

Assessor by Counties

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Many county assessor offices in Wyoming now offer online property search tools where homeowners can view their assessed value, recent sales history, and exemption status without visiting the office. If you have questions about a recent reassessment notice, calling or emailing the assessor's office is often the fastest way to get a response before filing a formal appeal.

Browse Assessor by county across Wyoming to find the nearest location.

A Property Owner's Calendar for Wyoming

Wyoming's assessment year follows a predictable rhythm, and knowing it saves money and stress. Values are set as of January 1. Through the winter and early spring, assessors review building permits, sales and changes in use. Notices of assessment are generally mailed in the spring, and that mailing starts the clock on your right to appeal.

Later in the year, local governments finalize budgets and mill levies, and the county treasurer mails tax bills. The first-half payment is delinquent after November 10, and the second after May 10. When property is sold, the deed is recorded with the county clerk, and the change then flows into the assessor's records. A new owner should confirm the mailing address so future notices are not lost.

Buyers should check a parcel's valuation history before closing. Ask the assessor how additions, new construction or a change from agricultural to residential use would be treated. Distances in Wyoming are long, and a county seat can be a significant drive from outlying ranches, so a phone call before you travel is usually worth the few minutes it takes.

Each of Wyoming's 23 counties has its own county assessor, and the office is an elected county position with a four-year term. There is no single statewide assessor who handles individual homeowners. The Wyoming Department of Revenue supervises the system, sets standards and trains local staff, but your valuation comes from the county office where the property is located. If you are unsure who currently holds the job, call the office listed for your county and ask for the assessor or a deputy. Staff can usually answer routine questions about parcels, notices and deadlines directly.

Your county assessor values most residential, commercial, agricultural and business personal property. The state handles specific categories directly, mainly mineral production and centrally assessed property such as pipelines and utility systems that cross county lines. The Department of Revenue also monitors county work to keep valuation methods consistent across Wyoming. If you own a mineral interest, a producing well or a utility asset, ask the county assessor which agency is responsible for that part of your holdings. That way you contact the correct office and meet the correct deadline.

Start with the assessor's office for your county, and do it soon after your notice of assessment arrives. Ask how the value was calculated and point out factual errors, such as wrong square footage or a demolished building. If you still disagree, you can take the matter to the county board of equalization, which is made up of the county commissioners. A further appeal may go to the State Board of Equalization. Deadlines are strict, so check the dates on your notice and put your appeal in writing, with photos and comparable sales attached.

Usually not. The assessor sets the value, but the county treasurer bills and collects the tax. Wyoming taxes are payable in two halves, with the first half delinquent after November 10 and the second after May 10. If you believe your bill is wrong, the assessor is the right person to ask about the value, while the treasurer handles payments, receipts and delinquent accounts. Remember that the mill levy comes from local taxing districts, so a higher bill does not always mean a higher assessment. Compare both numbers before you call either office.

Call the county, not the city. Jackson property belongs to the Teton County Assessor's Office at 200 South Willow Street, 307-733-4960. Cody property falls under the Park County Assessor's Office at 1002 Sheridan Avenue, 307-527-8650. Casper property is handled by the Natrona County Assessor's Office at 200 North Center Street, 307-235-9444. Cheyenne belongs to the Laramie County Assessor at 309 West 20th Street, 307-633-4307. If you live near a county line, check your tax bill, because the county printed there controls your valuation.

Yes. Wyoming values agricultural land based on its productive capability rather than its market price for development. That approach often produces lower values than residential or commercial land, but the land must actually qualify as agricultural. Ask your county assessor what qualifies, whether a form is needed, and what happens if the use changes later. Rural offices in counties such as Niobrara, Crook, Weston or Washakie handle these questions regularly. Rules and standards can change, so rely on the county office for current requirements instead of older advice from neighbors or former owners.