Union County Map, South Dakota

Written and Fact-checked by , Reviewed by | Last Updated On: May 11, 2026

Map of Union County - Union County is a county located in the U.S. state of South Dakota. Union County Map showing cities, highways, important places and water bodies. Get Where is Union County located in the map, major cities in Union county, population, areas, and places of interest.

Map of Union County, South Dakota

Map of Union County, South Dakota

About Union County Map, South Dakota: The map showing the county boundary, county seat, major cities, highways, water bodies and neighbouring counties.

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About Union County, South Dakota

Union County is a county located in the U.S. state of South Dakota. It's county seat is Elk Point. As per 2020 census, the population of Union County is 16872 people and population density is square miles. According to the United States Census Bureau, the county has a total area of 460 sq mi (1,191 km2). Union County was established on 1862.

Union County Facts

ContinentNorth America
CountryUnited States
StateSouth Dakota
County SeatElk Point
Largest City/TownNorth Sioux City
Established1862
Total Area467 sq mi (1,210 sq km)
Land Area461 sq mi (1,194 sq km)
Water Area6 sq mi (16 sq km)
Population16,811 (Census 2020)
Population Density36.5 people per sq mi
Time ZoneCentral Time Zone (CT)
Major HighwaysInterstate 29, US 18, SD 11
Major RiversMissouri River, Big Sioux River
Neighboring CountiesLincoln County, Clay County, Yankton County, Woodbury County (IA), Plymouth County (IA), Dakota County (NE)
Famous ForMissouri River recreation, North Sioux City growth, Dakota Dunes, outdoor recreation
Top AttractionsDakota Dunes Country Club, Adams Homestead and Nature Preserve, Missouri River recreation, McCook Lake
Official WebsiteOfficial Website

About Union County, South Dakota

Union County is located in southeastern South Dakota in the United States and was established in 1862. The county seat is Elk Point, while North Sioux City is the largest city. The county is known for Missouri River recreation, growing residential communities, golf destinations, and its location within the Sioux City metropolitan area.

Cities and Towns in Union County, South Dakota

City/TownPopulation (Census 2020)Latitude & Longitude
North Sioux City3,03642.5264°N, 96.4995°W
Elk Point (county seat)2,14942.6883°N, 96.6859°W
Beresford2,27243.0808°N, 96.7731°W
Alcester82043.0203°N, 96.6309°W
Jefferson62342.5925°N, 96.5595°W
Dakota Dunes3,02042.4875°N, 96.4850°W

Golf Courses in Union County, South Dakota

Golf CourseLocationLatitude & Longitude
Dakota Dunes Country ClubDakota Dunes42.4898°N, 96.4837°W
Two Rivers Golf ClubNorth Sioux City42.5169°N, 96.4971°W
Elk Point Country ClubElk Point42.6895°N, 96.6968°W
Fox Run Golf Course nearbyYankton42.8875°N, 97.4028°W

Roads and Highways in Union County, South Dakota

Major highways connect the county to Sioux Falls, Sioux City, Nebraska, Iowa, and regional Missouri River communities.

  • Interstate 29 - major north-south interstate highway through eastern South Dakota
  • US Highway 18 - important east-west route across southern South Dakota
  • South Dakota Highway 11 - regional route connecting southeastern South Dakota communities

What are Neighboring Counties of Union County

  • Lincoln County (north)
  • Clay County (west)
  • Yankton County (northwest)
  • Woodbury County, Iowa (east)
  • Plymouth County, Iowa (southeast)
  • Dakota County, Nebraska (south)

What are the Top Attractions in Union County, South Dakota

The county offers a mix of river recreation, golf resorts, nature preserves, and growing suburban communities.

  • Dakota Dunes Country Club - championship golf and resort-style recreation
  • Adams Homestead and Nature Preserve - hiking trails, historic buildings, and Missouri River scenery
  • Missouri River recreation - boating, fishing, kayaking, and water sports
  • McCook Lake recreation areas - fishing, camping, and outdoor activities
  • North Sioux City attractions - shopping, restaurants, entertainment, and local events
  • Two Rivers Golf Club - scenic golf and recreation destination
  • Prairie and river scenic drives - rolling hills and Missouri River Valley landscapes
  • Birdwatching and wildlife habitats - river ecosystems and migratory bird viewing
  • Camping and RV parks nearby - family-friendly outdoor recreation destinations
  • Photography and sunset viewing along the Missouri River - scenic outdoor experiences
  • Historic Elk Point attractions - pioneer history and community heritage
  • Regional fairs and festivals - celebrating local culture and agriculture
  • Fishing and hunting opportunities - outdoor recreation throughout the county
  • Nearby Sioux City attractions - museums, shopping centers, and entertainment venues

What is the Distance from Union County to Nearby Cities

The following distances are measured by road (driving).

  • Elk Point to Sioux City (Woodbury County), Iowa - 18 mi (29 km)
  • Elk Point to Vermillion (Clay County), South Dakota - 25 mi (40 km)
  • Elk Point to Yankton (Yankton County), South Dakota - 41 mi (66 km)
  • Elk Point to Sioux Falls (Minnehaha County), South Dakota - 58 mi (93 km)
  • Elk Point to Omaha (Douglas County), Nebraska - 106 mi (171 km)
  • Elk Point to Lincoln (Lancaster County), Nebraska - 162 mi (261 km)
  • Elk Point to Des Moines (Polk County), Iowa - 219 mi (352 km)
  • Elk Point to Pierre (Hughes County), South Dakota - 267 mi (430 km)
  • Elk Point to Fargo (Cass County), North Dakota - 299 mi (481 km)
  • Elk Point to Minneapolis (Hennepin County), Minnesota - 280 mi (451 km)
  • Elk Point to Rapid City (Pennington County), South Dakota - 414 mi (666 km)
  • Elk Point to Denver (Denver County), Colorado - 650 mi (1,046 km)

FAQs about Union County

Where is Union County located?

Union County is located in southeastern South Dakota along the Missouri River near Iowa and Nebraska.

What is the population of Union County?

Union County had a population of 16,811 according to the 2020 United States Census.

What is Union County known for?

Union County is known for Missouri River recreation, Dakota Dunes golf communities, and proximity to Sioux City.

What are the major highways in Union County?

The major highways include Interstate 29, US Highway 18, and South Dakota Highway 11.

What are popular attractions in Union County?

Popular attractions include Dakota Dunes Country Club, Adams Homestead and Nature Preserve, and Missouri River recreation areas.

References

  1. QuickFacts - U.S. Census Bureau
  2. United States Census Bureau
  3. United States Geological Survey (USGS)
  4. National Geodetic Survey
  5. Official Website