Cass County GIS Maps
Cass County, Iowa, has 13,127 residents across 17,098 parcels and covers 564.3 square miles. The population declined 5.9% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Cass County is 19029.
Atlantic is the county's largest population center. Cass County also includes 8 zip codes, 4 public school districts and 32 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 parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Cass County Trends
- Population
- 13,127▾
- Median Home Value
- $133,300▴
- K-12 Enrollment
- 4,712▴
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.
Cass 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.
Cass County Parcels
Cass County has 17,098 mapped parcels covering 357,122 acres. The median assessed value is $91,040. The median lot size is 39.74 acres. 9,566 parcels are 10 acres or larger. The records carry 6,591 distinct owner names. Owner names and assessed values are on nearly every parcel. Lot sizes reach 66.3%. Browse the interactive Cass County Parcel viewer here.
Cass County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 17,098 | 100% |
| Owner name | 17,098 | 100% |
| Owner mailing address | 0 | 0% |
| Site address | 8,057 | 47.1% |
| Land use code | 0 | 0% |
| Land use description | 0 | 0% |
| Assessed value | 17,049 | 99.7% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 11,334 | 66.3% |
| Parcel boundary | 17,098 | 100% |
| Download all Cass County parcels. | ||
Field coverage measured across all Cass County parcel records.
Cass County Population
Cass County had 13,127 residents in 2020. That was 5.9% lower than in 2010. Cass County had 1,557 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 23 people per square mile. Some of the county's most populated postal areas include Atlantic, Griswold and Anita.
Population Trend in Cass County IA
Cass County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Cass County Zip Codes
Cass County has 8 zip codes. Some of the county's most populated zip codes include Atlantic (50022), Griswold (51535) and Anita (50020). Atlantic is the largest zip by population, with about 8,052 residents or 61% of the county total. Together, the three largest zips account for about 85% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Cass County IA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 50022 | Atlantic | 8,052 | ▾ -5.2% |
| 51535 | Griswold | 1,764 | ▾ -8.3% |
| 50020 | Anita | 1,375 | ▾ -2.3% |
| 50853 | Massena | 688 | ▾ -2% |
| 51544 | Lewis | 648 | ▾ -10.1% |
| Download all zip code data | |||
Cass County Zip Code populations and trends per most recent census data.
Cass County Demographics
Cass County has a median age of 44, which makes the county a little older than Iowa overall. About 23.6% of residents are under 18, while 23.2% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 26.8% of the population, which points to a solid working-age base. About 21.6% of adults have a bachelor's degree or higher, above the statewide figure of 30.9%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Cass County IA
Median Age
44
Under 18
23.6%
Age 65+
23.2%
Bachelor's+
21.6%
Cass County School Districts
Cass County is served by 4 public school districts with 4,712 students enrolled in 2024. The largest districts on the county map are CAM Community, Atlantic Community and AHSTW Community. Those three districts account for about 91% of public school enrollment in the map area. Total enrollment has grown modestly since 2017 across the districts shown on the county map.
Largest School Districts by Enrollment in Cass County IA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| CAM Community School District | 1,950 | 41.4% | ▴ 14% |
| Atlantic Community School District | 1,587 | 33.7% | ▴ 0.3% |
| AHSTW Community School District | 755 | 16% | ▾ -1.3% |
| Griswold Community School District | 420 | 8.9% | ▾ -3.7% |
| Download all school district data | |||
Cass County school district enrollment and trends per most recent NCES reporting data.
Cass County Housing & Real Estate
Cass County has a median home value of $133,300 and a median gross rent of $769. About 72% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Iowa median, while rents come in below the state average. In March 2026, the median listing price was $180,150 and homes spent about 118 days on the market.
Cass County Housing Mix
Cass County housing mix: owner, renter and vacant units.
Cass County Housing Trends
Cass County median home value and rent trend (last 5 years).
Businesses in Cass County, IA
Cass County has 750 business listings across 284 categories. The largest categories in Cass County business listings are Churches & Religious Organizations (29, 3.9%), Contractors (17, 2.3%), and Parks & Recreation (17, 2.3%). The full Cass County business listings dataset includes names, categories, addresses and contact details where available. Cass County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Cass County, IA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 29 | 3.9% |
| Contractors | 17 | 2.3% |
| Parks & Recreation | 17 | 2.3% |
| Auto Repair | 17 | 2.3% |
| Gas Stations | 11 | 1.5% |
| Insurance Agencies | 10 | 1.3% |
| Bars & Nightlife | 10 | 1.3% |
| Chiropractors | 9 | 1.2% |
| Public And Government Association | 9 | 1.2% |
| Beauty Salons | 9 | 1.2% |
Cass County Business Listings
| Business | Category | City |
|---|---|---|
| Dirt Road Candle Co. | Accommodation | Atlantic |
| Gronewold Bell Kyhnn & Co | Accountant | Atlantic |
| Hansen Outfitters | Active Life | Anita |
| adultmart | Adult Store | Gibsonburg |
| Pattison Company | Aggregate Supplier | Wiota |
| Agriland FS Griswold | Agricultural Cooperatives | Griswold |
| Steinbeck and Sons | Agricultural Service | Griswold |
| Farm Service Co-Op | Agriculture Association | Atlantic |
| Atlantic Municipal Airport | Airport | Atlantic |
| Dusty's Place | American Restaurants | Griswold |
| Download Cass County business listings | ||
Cass County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Cass County Basemaps
Cass 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 Cass County Data Package
This page shows a preview of what's included in the Cass 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 parcels, 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 Cass County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.