Lemhi County GIS Maps
Lemhi County, Idaho, has 7,974 residents and covers 4,563.7 square miles. The population grew 0.5% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Lemhi County is 16059.
Salmon is the county's largest population center. Lemhi County also includes 9 zip codes, 3 public school districts and 14 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Lemhi County Trends
- Population
- 7,974▴
- Median Home Value
- $282,100▴
- K-12 Enrollment
- 1,089▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Lemhi County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Lemhi County Population
Lemhi County had 7,974 residents in 2020. That was 0.5% higher than in 2010. Lemhi County added 168 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 2 people per square mile. Some of the county's most populated postal areas include Salmon, Carmen and Leadore.
Population Trend in Lemhi County ID
Lemhi County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Lemhi County Zip Codes
Lemhi County has 9 zip codes. Some of the county's most populated zip codes include Salmon (83467), Carmen (83462) and Leadore (83464). Salmon is the largest zip by population, with about 6,169 residents or 77% of the county total. Together, the three largest zips account for about 88% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Lemhi County ID
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 83467 | Salmon | 6,169 | ▾ -1.6% |
| 83462 | Carmen | 508 | ▴ 9.5% |
| 83464 | Leadore | 363 | ▴ 5.2% |
| 83466 | North Fork | 299 | ▴ 9.5% |
| 83468 | Tendoy | 222 | ▴ 30.6% |
| Download all zip code data | |||
Lemhi County Zip Code populations and trends per most recent census data.
Lemhi County Demographics
Lemhi County has a median age of 53.1, which makes the county a little older than Idaho overall. About 18.3% of residents are under 18, while 30.4% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 65 and over at about 30.4% of the population, which points to an older population profile. About 22.9% of adults have a bachelor's degree or higher, above the statewide figure of 31.2%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Lemhi County ID
Median Age
53.1
Under 18
18.3%
Age 65+
30.4%
Bachelor's+
22.9%
Lemhi County School Districts
Lemhi County is served by 3 public school districts with 1,089 students enrolled in 2024. The largest districts on the county map are Salmon 291, Challis Joint 181 and South Lemhi 292. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Lemhi County ID
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Salmon School District 291 | 647 | 59.4% | ▾ -3.9% |
| Challis Joint School District 181 | 332 | 30.5% | ▾ -1.8% |
| South Lemhi School District 292 | 110 | 10.1% | ▾ -14.1% |
| Download all school district data | |||
Lemhi County school district enrollment and trends per most recent NCES reporting data.
Lemhi County Housing & Real Estate
Lemhi County has a median home value of $282,100 and a median gross rent of $721. About 81% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Idaho median, while rents come in below the state average. In March 2026, the median listing price was $420,000 and homes spent about 137 days on the market.
Lemhi County Housing Mix
Lemhi County housing mix: owner, renter and vacant units.
Lemhi County Housing Trends
Lemhi County median home value and rent trend (last 5 years).
Businesses in Lemhi County, ID
Lemhi County has 667 business listings across 250 categories. The largest categories in Lemhi County business listings are Structure And Geography (43, 6.4%), Lake (37, 5.5%), and Churches & Religious Organizations (16, 2.4%). The full Lemhi County business listings dataset includes names, categories, addresses and contact details where available. Lemhi County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Lemhi County, ID
| Category | Businesses | Share |
|---|---|---|
| Structure And Geography | 43 | 6.4% |
| Lake | 37 | 5.5% |
| Churches & Religious Organizations | 16 | 2.4% |
| Mountain | 15 | 2.2% |
| Landmark And Historical Building | 14 | 2.1% |
| Gas Stations | 14 | 2.1% |
| Convenience Stores | 10 | 1.5% |
| Campgrounds & RV Parks | 10 | 1.5% |
| Restaurants | 10 | 1.5% |
| River | 9 | 1.3% |
Lemhi County Business Listings
| Business | Category | City |
|---|---|---|
| Tower Creek | Accommodation | North Fork |
| Allen Accounting Group | Accountant | Salmon |
| Richie Outfitters | Active Life | Salmon |
| Intermountain Tractor | Agricultural Service | Salmon |
| Valley Wide Co-Op | Agriculture | Salmon |
| Gem Air LLC | Airline | Salmon |
| Lower Loon Creek Airstrip | Airport | Lemhi County |
| Elk Bend Quick Response Unit | Ambulance And Ems Services | Salmon |
| Wallys Cafe | American Restaurants | Salmon |
| Andy's Animal Hospital | Animal Hospital | Salmon |
| Download Lemhi County business listings | ||
Lemhi County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Lemhi County Basemaps
Lemhi County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Lemhi County Data Package
This page shows a preview of what's included in the Lemhi County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Lemhi County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.