South Dakota County Maps
Find South Dakota county and township maps.
Union County, South Dakota
Find your South Dakota County by searching for your address, or by clicking on the map.
Union County, South Dakota Map
A detailed map of Union County. Click on a nearby County to view more information about that County. County boundaries are from the U.S. Census Bureau's 2025 TIGER/Line files.
Map of Townships in Union County, South Dakota
An interactive map of county subdivisions in Union County. In South Dakota, that can include Townships, UTs, Towns, and Villages. Boundaries are from the U.S. Census Bureau's 2024 TIGER/Line files. Find what township you are in now.
Map of Counties in South Dakota
An interactive map of Counties in South Dakota. Click on a County to view more information about that County. County boundaries are from the U.S. Census Bureau's 2025 TIGER/Line files.
About Union County, South Dakota
Union County is the southernmost county in the U.S. state of South Dakota. As of the 2020 census, the population was 16,811, making it the 13th most populous county in South Dakota. Its county seat has been Elk Point since April 30, 1865. Originally named Cole County, its name was changed to Union on January 7, 1864, because of Civil War sentiment.
What is this?
This site has an interactive map of South Dakota Counties. Click on the map to find your South Dakota county, and view more details. You can also search for your address and use your GPS to find your South Dakota County.
Find what County you are in, and see official South Dakota County resources and information. Find any county in the United States, along with resources and links to official County websites. See a County map and local details. Looking for what county you are currently in? Find out on this map or use your device GPS to see what county you are in.
Snow Totals in Union County, South Dakota
See recent snowfall, snow depth, and records for each city and town in Union County, South Dakota.
About this data
- State and county boundaries
- TIGER/Line Shapefiles: States, Counties and ZIP Code Tabulation Areas (2025), U.S. Census Bureau. Boundaries of states, counties and ZIP Code Tabulation Areas, the Census Bureau's areas for ZIP codes. Updated
- County subdivision boundaries
- TIGER/Line Shapefiles: County Subdivisions and Places (2024), U.S. Census Bureau. Boundaries of towns, townships, cities and villages. Updated
- County list
- Cartographic Boundary Files: Counties (2024), U.S. Census Bureau. County names and extents, with Wikipedia links from Wikidata. Updated