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Dewey County, SD

Dewey County
Population: 5,972
Population Density: 2.6 per square mile

Water Area Percentage: 5.85% (143.03 square miles)
Land Area Percentage: 94.15% (2,302.64 square miles)
Total Area: 2,445.67 square miles
Housing Units: 2,133 per square mile

County Links



Waterfalls In Dewey County
• Buffalo Bay
• Dodge Bay
• Latin Bay
• Stove Creek Bay
• Swift Bird Bay
• Willow Creek Bay

Lakes In Dewey County
• Lake Oahe
Cities In Dewey County
Dupree
Eagle Butte
Gettysburg
Glencross
Isabel
Lantry
Mobridge
Ridgeview
Timber Lake
Trail City
Whitehorse

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Last Updated: 1/11/2026
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