Sioux County GIS Maps
Sioux County, Iowa, has 35,872 residents and covers 767.9 square miles. The population grew 6.4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Sioux County is 19167.
Sioux Center is the county's largest population center. Sioux County also includes 13 zip codes, 9 public school districts and 45 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.
Sioux County Trends
- Population
- 35,872▴
- Median Home Value
- $235,600▴
- K-12 Enrollment
- 8,180▾
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.
Sioux 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.
Sioux County Population
Sioux County had 35,872 residents in 2020. That was 6.4% higher than in 2010. Sioux County added 4,283 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 47 people per square mile. Some of the county's most populated postal areas include Sioux Center, Orange City and Sheldon.
Population Trend in Sioux County IA
Sioux County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Sioux County Zip Codes
Sioux County has 13 zip codes. Some of the county's most populated zip codes include Sioux Center (51250), Orange City (51041) and Sheldon (51201). Sioux Center is the largest zip by population, with about 9,427 residents or 26% of the county total. Together, the three largest zips account for about 64% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Sioux County IA
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 51250 | Sioux Center | 9,427 | ▴ 14.3% |
| 51041 | Orange City | 7,195 | ▴ 3.1% |
| 51201 | Sheldon | 6,408 | ▴ 3.5% |
| 51247 | Rock Valley | 5,432 | ▴ 11.5% |
| 51023 | Hawarden | 3,392 | ▴ 5.5% |
| Download all zip code data | |||
Sioux County Zip Code populations and trends per most recent census data.
Sioux County Demographics
Sioux County has a median age of 34, which makes the county a little younger than Iowa overall. About 27.4% of residents are under 18, while 15.9% 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 27.6% of the population, which points to a solid working-age base. About 30.4% of adults have a bachelor's degree or higher, above the statewide figure of 30.9%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Sioux County IA
Median Age
34
Under 18
27.4%
Age 65+
15.9%
Bachelor's+
30.4%
Sioux County School Districts
Sioux County is served by 9 public school districts with 8,180 students enrolled in 2024. The largest districts on the county map are Sioux Center Community, MOC-Floyd Valley Community and Sheldon Community. Those three districts account for about 53% 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 Sioux County IA
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Sioux Center Community School District | 1,659 | 20.3% | ▴ 1.9% |
| MOC-Floyd Valley Community School District | 1,495 | 18.3% | ▴ 0.7% |
| Sheldon Community School District | 1,179 | 14.4% | ▴ 1.6% |
| West Lyon Community School District | 973 | 11.9% | ▴ 0.1% |
| Rock Valley Community School District | 884 | 10.8% | ▾ -5.5% |
| Download all school district data | |||
Sioux County school district enrollment and trends per most recent NCES reporting data.
Sioux County Housing & Real Estate
Sioux County has a median home value of $235,600 and a median gross rent of $888. About 78% 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 $324,325 and homes spent about 60 days on the market.
Sioux County Housing Mix
Sioux County housing mix: owner, renter and vacant units.
Sioux County Housing Trends
Sioux County median home value and rent trend (last 5 years).
Businesses in Sioux County, IA
Sioux County has 1,611 business listings across 374 categories. The largest categories in Sioux County business listings are Churches & Religious Organizations (81, 5.0%), Gas Stations (28, 1.7%), and Agricultural Service (27, 1.7%). The full Sioux County business listings dataset includes names, categories, addresses and contact details where available. Sioux County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Sioux County, IA
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 81 | 5.0% |
| Gas Stations | 28 | 1.7% |
| Agricultural Service | 27 | 1.7% |
| Contractors | 26 | 1.6% |
| Auto Repair | 26 | 1.6% |
| Banks & Credit Unions | 21 | 1.3% |
| Gyms & Fitness | 20 | 1.2% |
| Flowers & Gifts | 20 | 1.2% |
| Beauty Salons | 19 | 1.2% |
| Pet Breeder | 18 | 1.1% |
Sioux County Business Listings
| Business | Category | City |
|---|---|---|
| Colenbrander Hall | Accommodation | Orange City |
| Pottebaum & Van Bruggen CPAs | Accountant | Sioux Center |
| Orange City RAGBRAI | Active Life | Orange City |
| De Jong Chiropractic | Acupuncture | Orange City |
| Agency Two Twelve | Advertising Agency | Sioux Center |
| Farmers Co-op Society | Agricultural Cooperatives | Sioux Center |
| Van Beek Natural Science | Agricultural Service | Orange City |
| Town and Country Implement | Agriculture | Rock Valley |
| Sioux County Regional Airport | Airport | Maurice |
| Sioux Center Ambulance Garage | Ambulance And Ems Services | Sioux Center |
| Download Sioux County business listings | ||
Sioux County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Sioux County Basemaps
Sioux 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 Sioux County Data Package
This page shows a preview of what's included in the Sioux 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 Sioux County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.