Union County, South Dakota Genealogy
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- 1 County Courthouse
- 2 History
- 3 Places/Localities
- 4 Resources
- 5 Societies and Libraries
- 6 Web Sites
- 7 References
1862--Union County was created 10 April 1862 from unorganized territory. County seat: Elk Point 
- Dakota County, Nebraska
- Dixon County, Nebraska
- Plymouth County, Iowa
- Sioux County, Iowa
- Woodbury County, Iowa
1905, 1915, 1925 State Censuses --Unique information could include: Ethnic Background, Maiden Name, Church Affiliation & Military Service
1905 state census with images can be viewed free at FamilySearch Record Search
1915 state census with images can be viewed free at FamilySearch Record Search
1925 state census with images can be viewed free at FamilySearch Record Search
Societies and Libraries
- USGenWeb project. May have maps, name indexes, history or other information for this county. Select the state, then the county.
- Family History Library Catalog
- The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).