Iowa County GIS Maps
Iowa County, Wisconsin, has 23,709 residents across 31,232 parcels and covers 762.7 square miles. The population grew 0.1% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Iowa County is 55049.
Dodgeville is the county's largest population center. Iowa County also includes 11 zip codes, 10 public school districts and 53 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.
Iowa County Trends
- Population
- 23,709▴
- Median Home Value
- $248,100▴
- K-12 Enrollment
- 8,325▾
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.
Iowa 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.
Iowa County Parcels
Iowa County has 31,232 mapped parcels covering 487,292 acres. The median assessed value is $26,600. The median lot size is 7.25 acres. 14,461 parcels are 10 acres or larger. The records carry 11,140 distinct owner names. Owner names and lot sizes are on nearly every parcel. Mailing addresses reach 97.0%. Assessed values reach 86.2%. Browse the interactive Iowa County Parcel viewer here.
Iowa County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 31,232 | 100% |
| Owner name | 30,812 | 98.7% |
| Owner mailing address | 30,310 | 97.0% |
| Site address | 11,922 | 38.2% |
| Land use code | 26,915 | 86.2% |
| Land use description | 0 | 0% |
| Assessed value | 26,915 | 86.2% |
| Land value | 26,915 | 86.2% |
| Improvement value | 27,886 | 89.3% |
| Acreage | 31,168 | 99.8% |
| Parcel boundary | 31,232 | 100% |
| Download all Iowa County parcels. | ||
Field coverage measured across all Iowa County parcel records.
Iowa County Population
Iowa County had 23,709 residents in 2020. That was 0.1% higher than in 2010. Iowa County added 929 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 31 people per square mile. Some of the county's most populated postal areas include Dodgeville, Mineral Point and Barneveld.
Population Trend in Iowa County WI
Iowa County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Iowa County Zip Codes
Iowa County has 11 zip codes. Some of the county's most populated zip codes include Dodgeville (53533), Mineral Point (53565) and Barneveld (53507). Dodgeville is the largest zip by population, with about 7,306 residents or 31% of the county total. Together, the three largest zips account for about 61% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Iowa County WI
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 53533 | Dodgeville | 7,306 | ▴ 0.4% |
| 53565 | Mineral Point | 4,899 | ▴ 2.8% |
| 53507 | Barneveld | 2,313 | ▴ 5.3% |
| 53503 | Arena | 1,923 | ▾ -1.2% |
| 53543 | Highland | 1,639 | ▾ -0.1% |
| Download all zip code data | |||
Iowa County Zip Code populations and trends per most recent census data.
Iowa County Demographics
Iowa County has a median age of 43.7, which makes the county a little older than Wisconsin overall. About 21.9% of residents are under 18, while 19.9% 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 28.8% of the population, which points to a solid working-age base. About 28.5% of adults have a bachelor's degree or higher, above the statewide figure of 32.8%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Iowa County WI
Median Age
43.7
Under 18
21.9%
Age 65+
19.9%
Bachelor's+
28.5%
Iowa County School Districts
Iowa County is served by 10 public school districts with 8,325 students enrolled in 2024. The largest districts on the county map are Mount Horeb Area, River Valley and Dodgeville. Those three districts account for about 53% 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 Iowa County WI
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Mount Horeb Area School District | 2,298 | 27.6% | ▾ -3.9% |
| River Valley School District | 1,043 | 12.5% | ▾ -3.1% |
| Dodgeville School District | 1,035 | 12.4% | ▾ -2.4% |
| Mineral Point School District | 800 | 9.6% | ▴ 2.3% |
| Wisconsin Heights School District | 782 | 9.4% | ▴ 1.3% |
| Download all school district data | |||
Iowa County school district enrollment and trends per most recent NCES reporting data.
Iowa County Housing & Real Estate
Iowa County has a median home value of $248,100 and a median gross rent of $941. 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 Wisconsin median, while rents come in below the state average. In March 2026, the median listing price was $397,308 and homes spent about 57 days on the market.
Iowa County Housing Mix
Iowa County housing mix: owner, renter and vacant units.
Iowa County Housing Trends
Iowa County median home value and rent trend (last 5 years).
Businesses in Iowa County, WI
Iowa County has 1,229 business listings across 357 categories. The largest categories in Iowa County business listings are Churches & Religious Organizations (45, 3.7%), Farm (30, 2.4%), and Parks & Recreation (26, 2.1%). The full Iowa County business listings dataset includes names, categories, addresses and contact details where available. Iowa County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Iowa County, WI
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 45 | 3.7% |
| Farm | 30 | 2.4% |
| Parks & Recreation | 26 | 2.1% |
| Gas Stations | 22 | 1.8% |
| Landmark And Historical Building | 22 | 1.8% |
| Hotels | 21 | 1.7% |
| Bars & Nightlife | 18 | 1.5% |
| Convenience Stores | 18 | 1.5% |
| Community & Nonprofits | 17 | 1.4% |
| Hair Salons | 17 | 1.4% |
Iowa County Business Listings
| Business | Category | City |
|---|---|---|
| Wood Violet Recovery | Wisconsin Addiction Treatment Center | Abuse And Addiction Treatment | Dodgeville |
| Walnut Hill, Mineral Point | Accommodation | Mineral Point |
| Harris Park Ice Arena | Active Life | Dodgeville |
| MAT Recovery Centers - Wisconsin | Addiction Rehabilitation Center | Dodgeville |
| Essentia Communications | Advertising Agency | Dodgeville |
| Insight FS | Agricultural Cooperatives | Cobb |
| Ritchie Implement | Agricultural Service | Cobb |
| B-L Agri Services | Agriculture | Highland |
| Tuschen Airport | Airport | Mineral Point |
| Hypnosis 4 Winners | Alternative Medicine | Dodgeville |
| Download Iowa County business listings | ||
Iowa County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Iowa County Basemaps
Iowa 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 Iowa County Data Package
This page shows a preview of what's included in the Iowa 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 Iowa County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.