Dewey County GIS Maps

Dewey 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.

Dewey County Parcels

Dewey County has 5,713 mapped parcels covering 618,499 acres. Agricultural dwellings account for 77.4% of parcels. Residential follows at 15.2% and commercial at 5.9%. The records carry 1,396 distinct owner names. Owner names are on nearly every parcel. Browse the interactive Dewey County Parcel viewer here.

Dewey County Parcel Data Coverage

Field coverage measured across all Dewey County parcel records. Download free sample data here.

Dewey County Population

Dewey County had 5,239 residents in 2020. That was 1.2% lower than in 2010. Dewey County had 733 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 2 people per square mile. Some of the county's most populated postal areas include Eagle Butte, Mobridge and Timber Lake.

Population Trend in Dewey County SD

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

Dewey County Zip Codes

Dewey County has 7 zip codes. Some of the county's most populated zip codes include Eagle Butte (57625), Mobridge (57601) and Timber Lake (57656). Eagle Butte is the largest zip by population, with about 4,029 residents or 77% of the county total. Together, the three largest zips account for about 165% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Dewey County SD

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

Dewey County Demographics

Dewey County has a median age of 27.6, which makes the county a little younger than South Dakota overall. About 37.6% of residents are under 18, while 9.9% 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 37.6% of the population, which suggests the county has a notable share of children and family households. About 17.3% of adults have a bachelor's degree or higher, above the statewide figure of 31.1%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.

Key Demographics for Dewey County SD

Dewey County School Districts

Dewey County is served by 3 public school districts with 1,118 students enrolled in 2024. The largest districts on the county map are Eagle Butte 20-1, Timber Lake 20-3 and Dupree 64-2. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.

Largest School Districts by Enrollment in Dewey County SD

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

Dewey County Housing & Real Estate

Dewey County has a median home value of $75,400 and a median gross rent of $714. About 61% 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 December 2025, the median listing price was $145,000 and homes spent about 177 days on the market.

Businesses in Dewey County, SD

Dewey County has 184 business listings across 103 categories. The largest categories in Dewey County business listings are River (12, 6.5%), Churches & Religious Organizations (11, 6.0%), and Schools (5, 2.7%). The full Dewey County business listings dataset includes names, categories, addresses and contact details where available. Dewey County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Dewey County, SD

Dewey County Business Listings

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

Dewey County Basemaps

Dewey 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.