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Dudley is an unincorporated community and census-designated place (CDP) in Fall River County, South Dakota, United States. The population was 28 at the 2020 census. It was first listed as a CDP prior to the 2020 census. It is in the western part of the county, 1 mile (1.6 km) northeast of Edgemont. It is bordered to the south by the Cheyenne River, an east-flowing tributary of the Missouri River. It is bordered to the west by the BNSF Railway and to the north by an abandoned line of the Burlington Northern Railroad, now part of the George S. Mickelson Trail. U.S. Route 18 passes just north of Dudley, leading northeast 23 miles (37 km) to Hot Springs and west the same distance to Mule Creek …
Intro from Wikipedia. Population: U.S. Census Bureau.
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Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From U.S. Geological Survey historical maps and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.