Custer County GIS Maps
Custer County, Idaho, has 4,275 residents and covers 4,922.2 square miles. The population declined 2.1% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Custer County is 16037.
Challis is the county's largest population center. Custer County also includes 5 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.
Custer County Trends
- Population
- 4,275▾
- Median Home Value
- $295,600▴
- K-12 Enrollment
- 926▾
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.
Custer 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.
Custer County Population
Custer County had 4,275 residents in 2020. That was 2.1% lower than in 2010. Custer County had 67 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 1 people per square mile. Some of the county's most populated postal areas include Challis, Mackay and Stanley.
Population Trend in Custer County ID
Custer County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Custer County Zip Codes
Custer County has 5 zip codes. Some of the county's most populated zip codes include Challis (83226), Mackay (83251) and Stanley (83278). Challis is the largest zip by population, with about 2,294 residents or 54% of the county total. Together, the three largest zips account for about 89% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Custer County ID
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 83226 | Challis | 2,294 | ▾ -8.4% |
| 83251 | Mackay | 1,100 | ▴ 0.3% |
| 83278 | Stanley | 416 | ▴ 123.7% |
| 83227 | Clayton | 157 | ▴ 10.6% |
| 83235 | Ellis | 83 | ▾ -16.2% |
| Download all zip code data | |||
Custer County Zip Code populations and trends per most recent census data.
Custer County Demographics
Custer County has a median age of 59.5, which makes the county a little older than Idaho overall. About 11.1% of residents are under 18, while 36.1% 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 36.1% of the population, which points to an older population profile. About 25.2% 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 Custer County ID
Median Age
59.5
Under 18
11.1%
Age 65+
36.1%
Bachelor's+
25.2%
Custer County School Districts
Custer County is served by 3 public school districts with 926 students enrolled in 2024. The largest districts on the county map are Butte County Joint 111, Challis Joint 181 and Mackay Joint 182. 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 Custer County ID
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Butte County Joint School District 111 | 376 | 40.6% | ▾ -3.6% |
| Challis Joint School District 181 | 332 | 35.9% | ▾ -1.8% |
| Mackay Joint School District 182 | 218 | 23.5% | ▴ 2.3% |
| Download all school district data | |||
Custer County school district enrollment and trends per most recent NCES reporting data.
Custer County Housing & Real Estate
Custer County has a median home value of $295,600 and a median gross rent of $744. About 78% 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 $419,250 and homes spent about 176 days on the market.
Custer County Housing Mix
Custer County housing mix: owner, renter and vacant units.
Custer County Housing Trends
Custer County median home value and rent trend (last 5 years).
Businesses in Custer County, ID
Custer County has 595 business listings across 159 categories. The largest categories in Custer County business listings are Lake (121, 20.3%), Mountain (58, 9.7%), and Structure And Geography (57, 9.6%). The full Custer County business listings dataset includes names, categories, addresses and contact details where available. Custer County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Custer County, ID
| Category | Businesses | Share |
|---|---|---|
| Lake | 121 | 20.3% |
| Mountain | 58 | 9.7% |
| Structure And Geography | 57 | 9.6% |
| River | 18 | 3.0% |
| Gas Stations | 13 | 2.2% |
| Campgrounds & RV Parks | 13 | 2.2% |
| Landmark And Historical Building | 13 | 2.2% |
| Lodge | 9 | 1.5% |
| Churches & Religious Organizations | 8 | 1.3% |
| Hotels | 8 | 1.3% |
Custer County Business Listings
| Business | Category | City |
|---|---|---|
| Rainbow's End Recovery Center | Abuse And Addiction Treatment | Challis |
| East Fork River Lodge | Accommodation | Clayton |
| Mine Hill Mackay Idaho | Active Life | Mackay |
| Star S Ranch Airport | Airport | Custer County |
| Sawtooth Luce's Restaurant | American Restaurants | Stanley |
| Mystic Saddle Ranch | Amusement Park | Stanley |
| Heart Of Idaho Animal Sanctuary | Animal Shelters | Challis |
| Maddog Gallery | Art Gallery | Challis |
| Crazyfish | Arts And Crafts | Clayton |
| Wells Fargo ATM | ATMs | CHALLIS |
| Download Custer County business listings | ||
Custer County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Custer County Basemaps
Custer 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 Custer County Data Package
This page shows a preview of what's included in the Custer 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 Custer County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.