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Lemhi County, ID
2 cities and towns and 9 ZIP codes in Lemhi County, Idaho.
Population
8,249
Land area
4,564sq mi
People per sq mi
2
ZIP codes
9
Cities and towns in Lemhi County
Lemhi County at a glance
- Lemhi County is 92% less dense than Idaho as a whole.
- Households here earn a median of $53,202 a year, 32% less than the Idaho figure of $77,800.
- A typical owner-occupied home is valued at $326,100 (22% below Idaho) and median rent is $754 a month.
- The biggest population centers are Salmon (3,203) and Leadore (135).
Local data for Lemhi County, ID
Counts from official public data
Housing and community stats
Lemhi County, ID, American Community Survey 2020-2024
Median household income
$53,202
Poverty rate
12.8%
Median home value
$326,100
Prices -2.9% in a year
Median rent
$754/mo
Homeownership
79.3%
Bachelor's or higher
24.1%
Median age
53.3
Average commute
15.5 min
Largest reported origins and ancestries: German Americans (1,628), Irish Americans (1,146), French Americans (363).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.3%
Sep 2026, +0.2 pts in a year
Average annual pay
$51,631
2,789 jobs, 2025
Income per person
$59,954
BEA, 2024
Federal spending
$89.7M
FY 2026, $11,253 per person
PPP loans
$11.7M
266 loans, 1,913 jobs reported
Campaign donations
$28.4K
Itemized, 2026 cycle
How people get to work
Lemhi County, ID, workers 16 and older. American Community Survey 5-year estimates
- Drove alone70.1%
- Carpooled10.5%
- Public transit0.0%
- Walked6.6%
- Bicycle0.8%
- Taxi, ride-hailing, motorcycle or other0.1%
- Worked from home11.8%
Average one-way commute: 15.5 minutes for people who do not work from home.
Environment and hazard risk
Lemhi County, ID, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: landslide
Storm events since 1996
333
Most often heavy snow
Flood insurance policies
31
0.6% of homes, county
July high / Jan low
86° / 11°F
9.5 inches of rain a year
Hazards, floods and storm historyCheck a flood zone11 historic places
Health statistics
Share of adults in Lemhi County, ID, CDC PLACES estimates
Obesity
30.4%
U.S. 33.3% -2.9 pts
Diabetes
12.7%
U.S. 12.1% +0.6 pts
Smoking
13.4%
U.S. 12.8% +0.6 pts
Uninsured (18-64)
9.3%
U.S. 11.1% -1.8 pts
Cities, towns and ZIP codes in Lemhi County
Population shown
Frequently asked questions
- What is the largest city in Lemhi County, ID?
- Salmon is the largest city or town in Lemhi County, with about 3,203 residents.
- How many ZIP codes are in Lemhi County?
- Lemhi County includes 9 ZIP Code Tabulation Areas, including 83253, 83462, 83463, 83464, 83465.
- What is the population of Lemhi County, ID?
- About 8,249 people live in Lemhi County, based on American Community Survey 5-year estimates.
- What counties border Lemhi County?
- Lemhi County borders Ravalli County, MT, Idaho County, Valley County, Beaverhead County, MT, Custer County, Butte County, Clark County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023