Union County, County in southeastern South Dakota, United States.
Union County occupies the southeastern corner of South Dakota, bordered by the Big Sioux River to the east and the Missouri River to the southwest. Rolling hills and fertile soil create a landscape where farming is the foundation of the local economy.
The region was established in 1862 as Cole County but renamed to Union County in 1864 to show support during the Civil War. The county seat moved from Richland to Elk Point in 1865, establishing an administrative center.
Farming families work the land across generations, growing grain and raising livestock that shape daily life and the landscape. The pace here follows the seasons and the needs of the fields that dominate the horizon.
Interstate 29 runs through the region from north to south, connecting communities to larger economic centers. This main transportation route facilitates the movement of agricultural products and daily travel for residents.
The area contains important historical sites from early European settlement with a deep agricultural heritage reaching back to pioneer times. Visitors often discover small towns where the past remains visible in the architecture and local stories.
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