Douglas County GIS Maps

Douglas 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.

Douglas County Population

Douglas County had 2,835 residents in 2020. That was 5.6% lower than in 2010. Douglas County had 623 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 7 people per square mile. Some of the county's most populated postal areas include Armour, Corsica and Delmont.

Population Trend in Douglas County SD

Douglas County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Douglas County Zip Codes

Douglas County has 5 zip codes. Some of the county's most populated zip codes include Armour (57313), Corsica (57328) and Delmont (57330). Armour is the largest zip by population, with about 1,165 residents or 41% of the county total. Together, the three largest zips account for about 96% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Douglas County SD

Douglas County Zip Code populations and trends per most recent census data.

Douglas County Demographics

Douglas County has a median age of 41.9, which makes the county a little older than South Dakota overall. About 26.2% of residents are under 18, while 23.4% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is Under 18 at about 26.2% of the population, which suggests the county has a notable share of children and family households. About 22.9% of adults have a bachelor's degree or higher, above the statewide figure of 31.1%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.

Key Demographics for Douglas County SD

Douglas County School Districts

Douglas County is served by 5 public school districts with 1,751 students enrolled in 2024. The largest districts on the county map are Parkston 33-3, Platte-Geddes 11-5 and Corsica-Stickney 21-3. Those three districts account for about 77% 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 Douglas County SD

Douglas County school district enrollment and trends per most recent NCES reporting data.

Douglas County Housing & Real Estate

Douglas County has a median home value of $125,000 and a median gross rent of $864. About 78% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the South Dakota median, while rents come in below the state average. In March 2026, the median listing price was $232,450 and homes spent about 85 days on the market.

Businesses in Douglas County, SD

Douglas County has 143 business listings across 90 categories. The largest categories in Douglas County business listings are Churches & Religious Organizations (14, 9.8%), Auto Repair (6, 4.2%), and Agricultural Service (4, 2.8%). The full Douglas County business listings dataset includes names, categories, addresses and contact details where available. Douglas County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Douglas County, SD

Douglas County Business Listings

Douglas County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Douglas County Basemaps

Douglas 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.

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 South Dakota — explore the full structure before you buy.