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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

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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

Airports
BOOTH RANCH
HUNT FIELD
ISABEL MUNI
LENLING
TIMBER LAKE MUNI

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Last Updated: 9/28/2025
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