Washington County GIS Maps
Washington County, Iowa, has 22,565 residents across 21,379 parcels and covers 568.8 square miles. The population grew 4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Washington County is 19183.
Washington is the county's largest population center. Washington County also includes 7 zip codes, 7 public school districts and 31 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.
Washington County Trends
- Population
- 22,565▴
- Median Home Value
- $199,600▴
- K-12 Enrollment
- 5,286▾
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.
Washington 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.
Washington County Parcels
Washington County has 21,379 mapped parcels covering 338,048 acres. Agricultural land accounts for 47.1% of parcels. Residential follows at 38.4% and commercial at 7.3%. The records carry 10,299 distinct owner names. Owner names are on nearly every parcel. Site addresses reach 56.0%. Browse the interactive Washington County Parcel viewer here.
Washington County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 21,379 | 100% |
| Owner name | 21,347 | 99.9% |
| Owner mailing address | 0 | 0% |
| Site address | 11,977 | 56.0% |
| Land use code | 0 | 0% |
| Land use description | 21,361 | 99.9% |
| Assessed value | 0 | 0% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 0 | 0% |
| Parcel boundary | 21,379 | 100% |
| Download all Washington County parcels. | ||
Field coverage measured across all Washington County parcel records.
Washington County Population
Washington County had 22,565 residents in 2020. That was 4% higher than in 2010. Washington County added 1,895 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 40 people per square mile. Some of the county's most populated postal areas include Washington, Riverside and Wellman.
Population Trend in Washington County IA
Washington County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Washington County Zip Codes
Washington County has 7 zip codes. Some of the county's most populated zip codes include Washington (52353), Riverside (52327) and Wellman (52356). Washington is the largest zip by population, with about 9,416 residents or 42% of the county total. Together, the three largest zips account for about 69% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Washington County IA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 52353 | Washington | 9,416 | ▴ 2.6% |
| 52327 | Riverside | 3,333 | ▴ 10.7% |
| 52356 | Wellman | 2,833 | ▴ 6.7% |
| 52248 | Keota | 1,674 | ▾ -7.8% |
| 52201 | Ainsworth | 1,177 | ▾ -7.1% |
| Download all zip code data | |||
Washington County Zip Code populations and trends per most recent census data.
Washington County Demographics
Washington County has a median age of 40.3, which makes the county a little older than Iowa overall. About 24.6% of residents are under 18, while 19.8% 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 24.9% 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 Washington County IA
Median Age
40.3
Under 18
24.6%
Age 65+
19.8%
Bachelor's+
24.9%
Washington County School Districts
Washington County is served by 7 public school districts with 5,286 students enrolled in 2024. The largest districts on the county map are Washington Community, Mid-Prairie Community and Pekin Community. Those three districts account for about 67% 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 Washington County IA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Washington Community School District | 1,600 | 30.3% | ▾ -1.3% |
| Mid-Prairie Community School District | 1,393 | 26.4% | ▾ -1.8% |
| Pekin Community School District | 566 | 10.7% | ▾ -9.1% |
| WACO Community School District | 558 | 10.6% | ▴ 4.9% |
| Highland Community School District | 510 | 9.6% | ▾ -8.8% |
| Download all school district data | |||
Washington County school district enrollment and trends per most recent NCES reporting data.
Washington County Housing & Real Estate
Washington County has a median home value of $199,600 and a median gross rent of $862. About 72% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Iowa median, while rents come in below the state average. In March 2026, the median listing price was $242,450 and homes spent about 70 days on the market.
Washington County Housing Mix
Washington County housing mix: owner, renter and vacant units.
Washington County Housing Trends
Washington County median home value and rent trend (last 5 years).
Businesses in Washington County, IA
Washington County has 1,144 business listings across 344 categories. The largest categories in Washington County business listings are Churches & Religious Organizations (48, 4.2%), Contractors (30, 2.6%), and Gas Stations (21, 1.8%). The full Washington County business listings dataset includes names, categories, addresses and contact details where available. Washington County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Washington County, IA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 48 | 4.2% |
| Contractors | 30 | 2.6% |
| Gas Stations | 21 | 1.8% |
| Farm | 19 | 1.7% |
| Auto Repair | 19 | 1.7% |
| Parks & Recreation | 18 | 1.6% |
| Flowers & Gifts | 17 | 1.5% |
| Beauty Salons | 16 | 1.4% |
| Community & Nonprofits | 15 | 1.3% |
| Agricultural Service | 15 | 1.3% |
Washington County Business Listings
| Business | Category | City |
|---|---|---|
| Hacienda Marshall | Accommodation | Kalona |
| LattaHarris, LLP CPAs & Consultants | Accountant | Washington |
| Sign Design | Advertising Agency | Washington |
| AGRILAND FS Washington | Agricultural Cooperatives | Washington |
| QC Supply | Agricultural Service | Washington |
| Harbison Cattle Company LLC | Agriculture | Brighton |
| Washington Municipal Airport | Airport | Washington |
| Washington County Ambulance | Ambulance And Ems Services | Washington |
| Ainsworth Four Corners Restaurant & Fuel Stop | American Restaurants | Ainsworth |
| Washington Veterinary Clinic | Animal Hospital | Washington |
| Download Washington County business listings | ||
Washington County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Washington County Basemaps
Washington 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 Washington County Data Package
This page shows a preview of what's included in the Washington 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.
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 Iowa — 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 Washington County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.