Cassia County GIS Maps
Cassia County, Idaho, has 24,655 residents and covers 2,565.6 square miles. The population grew 7.4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Cassia County is 16031.
Burley is the county's largest population center. Cassia County also includes 7 zip codes, 4 public school districts and 15 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.
Cassia County Trends
- Population
- 24,655▴
- Median Home Value
- $257,300▴
- K-12 Enrollment
- 11,653▾
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.
Cassia 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.
Cassia County Population
Cassia County had 24,655 residents in 2020. That was 7.4% higher than in 2010. Cassia County added 3,239 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 10 people per square mile. Some of the county's most populated postal areas include Burley, Declo and Oakley.
Population Trend in Cassia County ID
Cassia County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Cassia County Zip Codes
Cassia County has 7 zip codes. Some of the county's most populated zip codes include Burley (83318), Declo (83323) and Oakley (83346). Burley is the largest zip by population, with about 18,990 residents or 77% of the county total. Together, the three largest zips account for about 91% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Cassia County ID
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 83318 | Burley | 18,990 | ▴ 10.2% |
| 83323 | Declo | 1,962 | ▴ 0.6% |
| 83346 | Oakley | 1,459 | ▴ 1.2% |
| 83344 | Murtaugh | 1,339 | ▴ 18.7% |
| 83342 | Malta | 1,169 | ▾ -14.7% |
| Download all zip code data | |||
Cassia County Zip Code populations and trends per most recent census data.
Cassia County Demographics
Cassia County has a median age of 33.1, which makes the county a little younger than Idaho overall. About 31.2% of residents are under 18, while 13.7% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is Under 18 at about 31.2% of the population, which suggests the county has a notable share of children and family households. About 20.9% of adults have a bachelor's degree or higher, above the statewide figure of 31.2%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.
Key Demographics for Cassia County ID
Median Age
33.1
Under 18
31.2%
Age 65+
13.7%
Bachelor's+
20.9%
Cassia County School Districts
Cassia County is served by 4 public school districts with 11,653 students enrolled in 2024. The largest districts on the county map are Cassia County Joint 151, Minidoka County Joint 331 and American Falls Joint 381. Those three districts account for about 97% 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 Cassia County ID
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Cassia County Joint School District 151 | 5,484 | 47.1% | ▾ -0.4% |
| Minidoka County Joint School District 331 | 4,267 | 36.6% | ▾ -2.9% |
| American Falls Joint School District 381 | 1,514 | 13% | ▾ -1.3% |
| Murtaugh Joint School District 418 | 388 | 3.3% | ▴ 1.3% |
| Download all school district data | |||
Cassia County school district enrollment and trends per most recent NCES reporting data.
Cassia County Housing & Real Estate
Cassia County has a median home value of $257,300 and a median gross rent of $920. About 70% 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 $417,000 and homes spent about 51 days on the market.
Cassia County Housing Mix
Cassia County housing mix: owner, renter and vacant units.
Cassia County Housing Trends
Cassia County median home value and rent trend (last 5 years).
Businesses in Cassia County, ID
Cassia County has 1,196 business listings across 377 categories. The largest categories in Cassia County business listings are Churches & Religious Organizations (28, 2.3%), Structure And Geography (26, 2.2%), and Gas Stations (24, 2.0%). The full Cassia County business listings dataset includes names, categories, addresses and contact details where available. Cassia County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Cassia County, ID
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 28 | 2.3% |
| Structure And Geography | 26 | 2.2% |
| Gas Stations | 24 | 2.0% |
| Auto Repair | 23 | 1.9% |
| Real Estate Agents | 22 | 1.8% |
| Convenience Stores | 18 | 1.5% |
| Mexican Restaurants | 15 | 1.3% |
| Restaurants | 15 | 1.3% |
| Medical Offices | 14 | 1.2% |
| Hair Salons | 14 | 1.2% |
Cassia County Business Listings
| Business | Category | City |
|---|---|---|
| Parke View Rehabilitation and Care Center | Abuse And Addiction Treatment | Burley |
| Garald Price & Associates | Accountant | Burley |
| Nifty Marketing | Advertising Agency | Burley |
| Redox Bio-Nutrients | Agricultural Cooperatives | Burley |
| Simplot Western Stockmen's | Agricultural Service | Burley |
| Schenk Feedlot | Agriculture | Oakley |
| Burley Municipal Airport | Airport | Burley |
| Asthma And Allergy Of Idaho | Allergist | Burley |
| Jb's Restaurant | American Restaurants | Burley |
| Goose Pit Kennels | Animal Shelters | Burley |
| Download Cassia County business listings | ||
Cassia County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Cassia County Basemaps
Cassia 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 Cassia County Data Package
This page shows a preview of what's included in the Cassia 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 Cassia County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.