Adams County GIS Maps
Adams County, Iowa, has 3,704 residents across 10,050 parcels and covers 423.4 square miles. The population declined 8.1% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Adams County is 19003.
Corning is the county's largest population center. Adams County also includes 4 zip codes, 5 public school districts and 26 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.
Adams County Trends
- Population
- 3,704▾
- Median Home Value
- $116,900▴
- K-12 Enrollment
- 2,586▾
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.
Adams 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.
Adams County Parcels
Adams County has 10,050 mapped parcels covering 264,217 acres. The median assessed value is $53,600. The median lot size is 40.00 acres. 7,280 parcels are 10 acres or larger. The records carry 2,667 distinct owner names. Owner names and assessed values are on nearly every parcel. Lot sizes reach 91.5%. Browse the interactive Adams County Parcel viewer here.
Adams County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 10,050 | 100% |
| Owner name | 10,022 | 99.7% |
| Owner mailing address | 0 | 0% |
| Site address | 2,607 | 25.9% |
| Land use code | 0 | 0% |
| Land use description | 0 | 0% |
| Assessed value | 9,982 | 99.3% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 9,191 | 91.5% |
| Parcel boundary | 10,050 | 100% |
| Download all Adams County parcels. | ||
Field coverage measured across all Adams County parcel records.
Adams County Population
Adams County had 3,704 residents in 2020. That was 8.1% lower than in 2010. Adams County had 778 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 9 people per square mile. Some of the county's most populated postal areas include Corning, Prescott and Villisca.
Population Trend in Adams County IA
Adams County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Adams County Zip Codes
Adams County has 4 zip codes. Some of the county's most populated zip codes include Corning (50841), Prescott (50859) and Villisca (50857). Corning is the largest zip by population, with about 2,652 residents or 72% of the county total. Together, the three largest zips account for about 90% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Adams County IA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 50841 | Corning | 2,652 | ▾ -6.1% |
| 50859 | Prescott | 491 | ▾ -15.9% |
| 50857 | Villisca | 180 | ▾ -33.8% |
| 50839 | Corning | 36 | ▴ 5.9% |
| Download all zip code data | |||
Adams County Zip Code populations and trends per most recent census data.
Adams County Demographics
Adams County has a median age of 46.6, which makes the county a little older than Iowa overall. About 21.9% of residents are under 18, while 24% 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 26.2% of the population, which points to a solid working-age base. About 24.5% 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 Adams County IA
Median Age
46.6
Under 18
21.9%
Age 65+
24%
Bachelor's+
24.5%
Adams County School Districts
Adams County is served by 5 public school districts with 2,586 students enrolled in 2024. The largest districts on the county map are Creston Community, Lenox Community and Corning Community. Those three districts account for about 86% 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 Adams County IA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Creston Community School District | 1,303 | 50.4% | ▾ -5% |
| Lenox Community School District | 527 | 20.4% | ▾ -0.2% |
| Corning Community School District | 405 | 15.7% | — 0% |
| Villisca Community School District | 243 | 9.4% | ▾ -4.3% |
| Orient-Macksburg Community School District | 108 | 4.2% | ▾ -16.3% |
| Download all school district data | |||
Adams County school district enrollment and trends per most recent NCES reporting data.
Adams County Housing & Real Estate
Adams County has a median home value of $116,900 and a median gross rent of $909. About 77% 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 $152,925 and homes spent about 103 days on the market.
Adams County Housing Mix
Adams County housing mix: owner, renter and vacant units.
Adams County Housing Trends
Adams County median home value and rent trend (last 5 years).
Businesses in Adams County, IA
Adams County has 220 business listings across 143 categories. The largest categories in Adams County business listings are Churches & Religious Organizations (9, 4.1%), Farm (6, 2.7%), and Auto Repair (5, 2.3%). The full Adams County business listings dataset includes names, categories, addresses and contact details where available. Adams County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Adams County, IA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 9 | 4.1% |
| Farm | 6 | 2.7% |
| Auto Repair | 5 | 2.3% |
| Pizza Restaurants | 4 | 1.8% |
| Agricultural Service | 4 | 1.8% |
| Hospitals | 4 | 1.8% |
| Livestock Breeder | 3 | 1.4% |
| Hardware Stores | 3 | 1.4% |
| Nursery And Gardening | 3 | 1.4% |
| Public And Government Association | 3 | 1.4% |
Adams County Business Listings
| Business | Category | City |
|---|---|---|
| Mittag Design | Advertising Agency | Prescott |
| 212 Livestock Products | Agricultural Service | Creston |
| Red Star Feed LLC | Agriculture | Corning |
| Primrose | American Restaurants | Corning |
| Cottonwood Estates | Apartments | Corning |
| Lifetime Systems Sales and Services | Appliance Repair Service | Corning |
| Templeton's Appliance | Appliance Store | Corning |
| Corning Center for the Fine Arts | Art Gallery | Corning |
| LibertyX Bitcoin ATM | ATMs | Corning |
| Todd Crill Auctions | Auction House | Corning |
| Download Adams County business listings | ||
Adams County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Adams County Basemaps
Adams 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 Adams County Data Package
This page shows a preview of what's included in the Adams 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 Adams County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.