Property tax in Lemhi County, Idaho

By Brent Chudoba, editor Updated September 23, 2026

The median property tax bill in Lemhi County, Idaho is $1,156 a year, which is about 0.35% of the county's median home value of $326,100. That effective rate is lower than the typical Idaho county (0.45%) 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 Lemhi County

Enter a home's market value for a ballpark at Lemhi County's average effective rate of 0.35% (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: $1,141 / year

Property tax in Lemhi County at a glance

Lemhi County, Idaho property tax (Census ACS, reviewed September 23, 2026)
Measure	Value
Median annual property tax	$1,156
Median home value	$326,100
Effective tax rate	0.35%
Typical Idaho county rate	0.45%
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 Lemhi County compare in Idaho?

Among Idaho's 44 counties, Lemhi County has the 37th highest effective property-tax rate: 36 rank higher and 7 rank lower. That is on the lower side for Idaho. Nationally, it ranks 3003rd of 3135 US counties by effective rate. See every Idaho county ranked.

How much do homeowners in Lemhi County actually pay?

The median is only the middle bill. Across Lemhi County's 2,741 owner-occupied homes, 5.1% pay $3,000 or more a year in property tax, 21.8% pay at least $2,000, and 34.8% pay under $800. Another 4.3% report paying no property tax at all, which usually means an exemption covers the whole bill.

Annual property tax paid by Lemhi County homeowners (Census ACS 2020-2024)
Annual bill	Homes	Share
Under $800	953	34.8%
$800 to $1,499	759	27.7%
$1,500 to $1,999	313	11.4%
$2,000 to $2,999	458	16.7%
$3,000 or more	141	5.1%
No property tax paid	117	4.3%

Owners with a mortgage pay a median of $1,405 and owners without one pay $919. 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 Lemhi County property tax bill compare with local incomes?

The median property tax bill of $1,156 is about 2% of the median income of Lemhi County homeowner households, $59,202 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 79.3% of Lemhi 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 Lemhi County?

Yes. The median bill went from $925 in 2015-2019 to $1,156 in 2020-2024, a 25% rise. Over the same span the median home value moved 84.2%, from $177,000 to $326,100. Bills rose more slowly than values, which is what assessment caps and falling millage rates do: the county is taxing a smaller share of each home's worth.

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 Lemhi County

Lemhi County borders 7 counties, 2 of them across the state line.

Lemhi County and its neighbors, highest effective rate first (Census ACS 2020-2024)
County	Effective rate	Median bill	Median home value
Beaverhead County, MT	0.67%	$2,069	$308,300
Ravalli County, MT	0.5%	$2,380	$476,600
Butte County, ID	0.49%	$1,061	$217,600
Lemhi County, ID (this county)	0.35%	$1,156	$326,100
Clark County, ID	0.33%	$713	$216,900
Idaho County, ID	0.32%	$995	$310,200
Valley County, ID	0.3%	$1,964	$657,000
Custer County, ID	0.29%	$1,112	$381,700

How is a home assessed in Lemhi County?

Idaho assesses homes at 100% of market value in every county, Lemhi County included. How Idaho assesses and reappraises homes.

Is there a homestead exemption in Lemhi County?

Yes. Idaho's homeowner's exemption takes 50% of a primary home's value off the assessment, capped at $125,000. Apply once through the county assessor. That is the Idaho rule, and it applies in Lemhi County. Idaho's exemptions and relief programs in full.

When are property taxes due in Lemhi County?

Counties mail bills in November. The full amount is due by December 20, or you can split it and pay half by December 20 with the second half due by June 20. The June grace period only applies if the first half was paid in full and on time. Miss either deadline and late charges plus interest are added to whatever is outstanding.

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

How to appeal your Lemhi County property assessment

You contest the assessed value with the county board of equalization, then the Idaho Board of Tax Appeals or district court. The filing deadline is typically the fourth Monday in June for property on the regular roll, or the fourth Monday in November for the subsequent roll. That is the Idaho rule; Lemhi County sets the exact dates and forms. The Idaho appeal process step by step.

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

Work out your own numbers

Sources

Median real estate taxes paid and median home value for Lemhi County, Idaho: 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.