Property tax in Sweetwater County, Wyoming

By Brent Chudoba, editor Updated September 23, 2026

The median property tax bill in Sweetwater County, Wyoming is $1,542 a year, which is about 0.61% of the county's median home value of $251,400. That effective rate is higher than the typical Wyoming county (0.56%) and lower than the national median (0.81%). These are American Community Survey 5-year estimates (2024); your own bill depends on your home's assessed value and any exemptions.

Estimate the property tax on a home in Sweetwater County

Enter a home's market value for a ballpark at Sweetwater County's average effective rate of 0.61% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.

Home market value

Estimated property tax: $1,534 / year

Property tax in Sweetwater County at a glance

Sweetwater County, Wyoming property tax (Census ACS, reviewed September 23, 2026)
Measure	Value
Median annual property tax	$1,542
Median home value	$251,400
Effective tax rate	0.61%
Typical Wyoming county rate	0.56%
National median county rate	0.81%

Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates.

How does Sweetwater County compare in Wyoming?

Among Wyoming's 23 counties, Sweetwater County has the 4th highest effective property-tax rate: 3 rank higher and 19 rank lower. That is on the higher side for Wyoming. Nationally, it ranks 2240th of 3135 US counties by effective rate. See every Wyoming county ranked.

How much do homeowners in Sweetwater County actually pay?

The median is only the middle bill. Across Sweetwater County's 13,049 owner-occupied homes, 9.6% pay $3,000 or more a year in property tax, 29.2% pay at least $2,000, and 21.2% pay under $800. Another 5.2% report paying no property tax at all, which usually means an exemption covers the whole bill.

Annual property tax paid by Sweetwater County homeowners (Census ACS 2020-2024)
Annual bill	Homes	Share
Under $800	2,767	21.2%
$800 to $1,499	3,196	24.5%
$1,500 to $1,999	2,594	19.9%
$2,000 to $2,999	2,557	19.6%
$3,000 or more	1,250	9.6%
No property tax paid	685	5.2%

Owners with a mortgage pay a median of $1,768 and owners without one pay $1,236. Owners who have paid off a home have usually held it longer, and in states that cap how fast an existing owner's assessment can rise, long-held homes carry lower assessed values. Census table B25103.

How does the Sweetwater County property tax bill compare with local incomes?

The median property tax bill of $1,542 is about 1.7% of the median income of Sweetwater County homeowner households, $88,806 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 74.6% of Sweetwater County's occupied homes are lived in by their owners; renters pay property tax too, just folded into rent.

Have property taxes gone up in Sweetwater County?

Yes. The median bill went from $1,270 in 2015-2019 to $1,542 in 2020-2024, a 21.4% rise. Over the same span the median home value moved 22.3%, from $205,600 to $251,400.

Two Census ACS 5-year periods with no survey years in common, in each period's own dollars. A change counts only if it exceeds the combined 90% margin of error.

Property tax in counties next to Sweetwater County

Sweetwater County borders 8 counties, 3 of them across the state line.

Sweetwater County and its neighbors, highest effective rate first (Census ACS 2020-2024)
County	Effective rate	Median bill	Median home value
Fremont County, WY	0.62%	$1,671	$268,800
Sweetwater County, WY (this county)	0.61%	$1,542	$251,400
Carbon County, WY	0.57%	$1,279	$222,700
Uinta County, WY	0.54%	$1,565	$290,000
Daggett County, UT	0.46%	$1,304	$282,300
Lincoln County, WY	0.45%	$1,664	$372,600
Sublette County, WY	0.44%	$1,665	$376,200
Moffat County, CO	0.4%	$1,146	$289,500
Summit County, UT	0.35%	$3,701	$1,067,700

How is a home assessed in Sweetwater County?

Wyoming assesses homes at 9.5% of market value in every county, Sweetwater County included. How Wyoming assesses and reappraises homes.

Is there a homestead exemption in Sweetwater County?

Yes, as a percentage. Wyoming exempts twenty-five percent of the fair market value of a single family home, on up to $1,000,000 of value, for owners who live there at least eight months a year. That is the Wyoming rule, and it applies in Sweetwater County. Wyoming's exemptions and relief programs in full.

When are property taxes due in Sweetwater County?

Wyoming splits the annual bill in two. The first half becomes due September 1 and is payable through November 10, and the second becomes due March 1 and is payable through May 10 of the following year. Pay the entire year by December 31 and no interest or penalty is charged. Anything unpaid after its payable date is delinquent and accrues interest at 18% a year.

Wyoming splits the bill into 2 installments. That is the Wyoming rule. Sweetwater County issues and collects the bill, so the dates printed on your statement are the ones that bind you.

How to appeal your Sweetwater County property assessment

You contest the assessed value with the County Board of Equalization, then the Wyoming State Board of Equalization. The filing deadline is typically 30 days after the county assessor sends your assessment schedule. That is the Wyoming rule; Sweetwater County sets the exact dates and forms. The Wyoming appeal process step by step.

Wyoming rules from primary state sources, reviewed September 7, 2026; sources on the Wyoming page.

Work out your own numbers

Sources

Median real estate taxes paid and median home value for Sweetwater County, Wyoming: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103, B25077, B25102, B25119 and B25003; the five-year comparison uses the 2015-2019 estimates. Neighboring counties: Census county adjacency file.