Lewis County GIS Maps
Lewis County, Idaho, has 3,533 residents and covers 478.8 square miles. The population declined 7.5% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Lewis County is 16061.
Kamiah is the county's largest population center. Lewis County also includes 2 zip codes, 5 public school districts and 10 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.
Lewis County Trends
- Population
- 3,533▾
- Median Home Value
- $202,400▴
- K-12 Enrollment
- 1,248▾
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.
Lewis 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.
Lewis County Population
Lewis County had 3,533 residents in 2020. That was 7.5% lower than in 2010. Lewis County had 214 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 7 people per square mile. Two of the county's most populated postal areas are Craigmont and Nezperce.
Population Trend in Lewis County ID
Lewis County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Lewis County Zip Codes
Lewis County has 2 zip codes. Two of the county's most populated zip codes are Craigmont (83523) and Nezperce (83543). Craigmont is the largest zip by population, with about 753 residents or 21% of the county total. Together, the three largest zips account for about 41% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Lewis County ID
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 83523 | Craigmont | 753 | ▾ -0.8% |
| 83543 | Nezperce | 679 | ▾ -5.3% |
| Download all zip code data | |||
Lewis County Zip Code populations and trends per most recent census data.
Lewis County Demographics
Lewis County has a median age of 48.9, which makes the county a little older than Idaho overall. About 22% of residents are under 18, while 27.8% 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 27.8% of the population, which points to an older population profile. About 20% 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 Lewis County ID
Median Age
48.9
Under 18
22%
Age 65+
27.8%
Bachelor's+
20%
Lewis County School Districts
Lewis County is served by 5 public school districts with 1,248 students enrolled in 2024. The largest districts on the county map are Cottonwood Joint 242, Kamiah Joint 304 and Nezperce Joint 302. Those three districts account for about 79% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.
Largest School Districts by Enrollment in Lewis County ID
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Cottonwood Joint School District 242 | 426 | 34.1% | ▾ -2.1% |
| Kamiah Joint School District 304 | 380 | 30.4% | ▾ -1.8% |
| Nezperce Joint School District 302 | 174 | 13.9% | ▴ 3% |
| Highland Joint School District 305 | 168 | 13.5% | ▾ -1.8% |
| Culdesac Joint School District 342 | 100 | 8% | ▾ -13% |
| Download all school district data | |||
Lewis County school district enrollment and trends per most recent NCES reporting data.
Lewis County Housing & Real Estate
Lewis County has a median home value of $202,400 and a median gross rent of $708. About 74% 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 $302,225 and homes spent about 42 days on the market.
Lewis County Housing Mix
Lewis County housing mix: owner, renter and vacant units.
Lewis County Housing Trends
Lewis County median home value and rent trend (last 5 years).
Businesses in Lewis County, ID
Lewis County has 200 business listings across 123 categories. The largest categories in Lewis County business listings are Gas Stations (10, 5.0%), Churches & Religious Organizations (6, 3.0%), and Beauty Salons (6, 3.0%). The full Lewis County business listings dataset includes names, categories, addresses and contact details where available. Lewis County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Lewis County, ID
| Category | Businesses | Share |
|---|---|---|
| Gas Stations | 10 | 5.0% |
| Churches & Religious Organizations | 6 | 3.0% |
| Beauty Salons | 6 | 3.0% |
| Public And Government Association | 5 | 2.5% |
| High School | 5 | 2.5% |
| Libraries | 4 | 2.0% |
| Farm | 4 | 2.0% |
| Landmark And Historical Building | 3 | 1.5% |
| Shipping Center | 3 | 1.5% |
| Real Estate Agents | 3 | 1.5% |
Lewis County Business Listings
| Business | Category | City |
|---|---|---|
| Vilensky & Company, LLC | Accountant | Kamiah |
| Hillco Technologies Inc. | Agricultural Service | Nezperce |
| Craigmont Municipal Airport | Airport | Craigmont |
| Lake City Dining | American Restaurants | Winchester |
| Craigmont Hardware & Antiques Too | Antique Store | Craigmont |
| River Arts Kamiah | Art School | Kamiah |
| Dave's Repair | Auto Repair | Craigmont |
| NAPA Auto Parts | Auto Parts And Supply Store | Kamiah |
| Hearthstone Restaurant Bakery | Bakeries | Kamiah |
| Wells Fargo Bank | Banks & Credit Unions | Kamiah |
| Download Lewis County business listings | ||
Lewis County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Lewis County Basemaps
Lewis 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 Lewis County Data Package
This page shows a preview of what's included in the Lewis 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.
One-time · instant download · 30-day refund guarantee · See full package details
Preview a Live Package Demo
See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Idaho — explore the full structure before you buy.
No email or download required. Opens in a preview window on this page.
Nearby Counties
Browse county data pages for the counties that border Lewis County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.