Dewey County South Dakota - Government Site
Population: 6,112
Area: 2303 square miles
County Seat: Timber Lake
Area Code(s) in use: 605
Time Zone: MST
Adjacent counties:
Corson Haakon Potter Stanley Sully Walworth Ziebach
Airport
Dean Hunt Landing Strip, Isabel Municipal Airport, Lenling Airstrip, McDaniel Landing Strip, Timber Lake Municipal Airport, Wallace Jewett Airstrip
Bay
Buffalo Bay, Dodge Bay, Latin Bay, Stove Creek Bay, Swift Bird Bay, Willow Creek Bay
Bend
Little Bend
Building
Swift Bird Training Center
Cemetery
Eagle Butte Cemetery, Emmanuel Cemetery, Green Grass Cemetery, Hillview Cemetery, Holy Cross Cemetery, Lantry Cemetery, Le Beau Cemetery (historical), Lindsay Cemetery, On-a-Tree Cemetery, Our Savior Cemetery, Rousseau Cemetery, Rushs Enemy Cemetery, Sacred Heart Cemetery, Saint James Cemetery, Saint Johns Cemetery, Saint Josephs Cemetery, Swift Bird Cemetery (historical), Trail City Cemetery, Walking Horse Cemetery
Church
Agency Church, Ascension Church, Ascension Church (historical), Collamar Church (historical), Corpus Cristi Church, Emmanuel Church, Green Grass Church (historical), Le Beau Church (historical), On-a-Tree Church, Saint Basils Church, Saint John the Evangelist Church, Saint Johns Church, Saint Josephs Church, Saint Marys Church, Saint Pauls Church, Saint Stephens Church, Saint Stephens Mission (historical), Saint Thomas Church (historical), Spotted Eagle Mission (historical), Swift Bird Church (historical), Whitehorse Catholic Church
Civil
City of Eagle Butte, City of Isabel, City of Timber Lake, Dewey County, Township of Firesteel, Unorganized Territory of North Dewey, Unorganized Territory of South Dewey
Dam
A Lee Dam, B Curtis Dam, B Oleary Dam, B Schuh Dam, Brueschke Dam, C J Larson Number 1 Dam, C Peterson Number 1 Dam, C Peterson Number 2 Dam, C Peterson Number 3 Dam, C Peterson Number 4 Dam, D Booth Dam, D Booth Number 2 Dam, D Booth Number 3 Dam, D Schrempp Dam, D Woddell Dam, Dick Simon Number 1 Dam, Don Farlee Dam, E Bruske Dam, F Curtis Dam, F Joens Dam, F Macijewske Dam, Fred Joens Dam, G and J Heck Number 1 Dam, G and J Heck Number 2 Dam, G and J Heck Number 2 Dam, G Boldt Dam, G French Homestead Dam, G Hand Dam, G Holloway Dam, G P Joens Dam, Gail Vrooman Dam, Garr Dam, Glen Bringman Dam, Glen Holloway Dam, Goose Creek Dam, H C Seymore East Dam, H Chamberlin Dam, H Harrison Dam, H Holm Dam, H Hulm Dam, H Lesmeister Dam, Hand Dam, Hazel Miller Number 1 Dam, I Molstad Dam, Isabel Lake Dam, J Reich Number 1 Dam, J Reich Number 2 Dam, J Reichert Dam, Jean Simon Number 1 Dam, Joe Gesinger Number 1 Dam, John Gesinger Number 1 Dam, John Holloway Dam, John Meginess Dam, Jones Dam, Kerstiens Dam, L Koch Dam, Lee Dam, Little Moreau Lake Dam, Louis Lesmeister Dam, M A Curtis Dam, M A Curtis Dam, M Schremp Dam, M Webb Dam, M Webb Dam, Maciejewski Dam, Maciejewski Dam, Merkel Dam, Mike Welder Dam, O Counting Dam, O Jewett Dam, O'Leary Dam, O'Leary Ranch 1 Dam, O'Leary Ranch 2 Dam, P Garr Dam, P Stradinger Number 2 Dam, R Bartels Number 1 Dam, R Berndt Dam, R Clark Number 1 Dam, R Clark Number 2 Dam, R Clark Number 3 Dam, R E Grazing Number 1 Dam, R Hepper Dam, R Kinning Dam, R Schrempp Dam, Ray Haberman Sr Number 1 Dam, Ray Haberman Sr Number 2 Dam, Rock Cowan Number 1 Dam, Rock Cowan Number 2 Dam, Rock Cowan Number 3 Dam, Rock Cowan Number 4 Dam, S Tidball Dam, School Land Dam, School Land Dam, Stradinger Number 1 Dam, Thorstensen 1 Dam, Thorstensen 2 Dam, Thorstensen 3 Dam, Timber Lake Cattle Company Number 3 Dam, Vern Long Dam, W F Collins Dam, W Scholl Dam
Flat
Kid Rich Flats
Island
Dolphees Island (historical), Fishermans Island (historical), Lafferty Island (historical)
Lake
Horseshoe Lake, Lake Wilson, Lantry Lake, Livermant Lake, Timber Lake
Locale
Agneau Ranch, Blackfoot Community, Cheyenne River Indian Agency (historical), Clark Ranch, Dan Gray Ranch, Delaine Gray Ranch, Dog Eagle Ranch, Ducheneau Ranch, Ducheneau Ranch, Ewing Ranch, Fast Horse Ranch, Fisher Ranch, Gesinger Ranch, Gordon LeCompte Ranch, Gunville Ranch, H Triangle Ranch, Hagel Ranch, Henry Ducheneaux Ranch, Hiett Ranch, High Elk Ranch, Holloway Ranch, Keckler Ranch, Lyman Ranch (historical), Marshell Ranch, Means Ranch, Mossman, Newbrough Ranch, Nordvold Ranch, Opp Ranch, Oscar Gray Ranch, Pearman Ranch, Quentin LeCompte Ranch, Reeves Ranch, Ridgeview Ranch, Rubendall Ranch, Simon Ranch, Skates Ranch, Sogge Ranch, Strong Ranch, Timber Lake Country Club, Valle Trading Post (historical), Vanderveer Ranch, Wager Ranch, Wayne Ducheneaux Ranch, West Ranch
Park
Firesteel State Public Shooting Area, Forest City Recreation Area, Isabel Lake State Public Shooting Area, Little Moreau State Recreation Area, Shupic Park
Populated Place
Bear Creek, Eagle Butte, Firesteel, Glencross, Green Grass, Isabel, La Plant, Lantry, Marksville, Moreau, North Eagle Butte, Parade, Promise, Ridgeview, Thatcher, Timber Lake, Trail City, Virginia, Whitehorse, Yellowhorse Ford
Range
Gray Buttes, Twin Buttes
Reserve
Cheyenne River Indian Reservation
Reservoir
Brueschke Dam, Eagle Butte Lake, Goose Creek Dam, Isabel Lake, Jewitt Pond, Lake Walton, Little Moreau Lake, Peach Lake, Swan Lake, Whitehorse Lake
Ridge
Patch Skin Buttes
School
Bear Creek Day School, Four Bear School (historical), Liebelt School, O Donnell School, Swift Bird Day School
Stream
Alberts Creek, Bear Creek, Beaver Creek, Blue Beaver Creek, Buck Creek, Buffalo Creek, Bull Creek, Bull Creek, Charlie Creek, Cheyenne River, Cheyenne River, Cheyenne River, Chicken Creek, Corral Creek, Cottonwood Creek, Dog Butte Creek, Du Charme Creek, East Branch Rousseau Creek, East Branch Tall Prairie Chicken Creek, East Branch Willow Creek, East Fork Beaver Creek, East Fork No Mouth Creek, Elm Creek, Fairbanks Creek, Fielder Creek, Fishgut Creek, Four Creek, Fox Creek, Goose Creek, Green Grass Creek, Handboy Creek, Herbert Creek, Hokshela Creek, Hosupa Creek, Jewett Creek, Joes Creek, Johnson Creek, Jolley Creek, Laundreaux Creek, Le Beau Creek, Le Compte Creek, Left Hand Bear Creek, Little Bear Creek, Little Bear Creek, Little Creek, Little Moreau River, Little Willow Creek, Marshall Creek, Meadow Creek, Moreau River, No Heart Creek, No Mouth Creek, Paradis Creek, Parker Creek, Parkers Creek, Pascal Creek, Red Earth Creek, Redwater Creek, Rousseau Creek, Sage Creek, Scatter Butte Creek, Splits Creek, Stove Creek, Swan Creek, Swift Bird Creek, Tall Prairie Chicken Creek, Thompson Creek, Three Legs Creek, Timber Creek, Tom Hill Creek, Veo Creek, Virgin Creek, West Branch Rousseau Creek, West Branch Tall Prairie Chicken Creek, West Branch Willow Creek, West Fork No Mouth Creek, Whitehorse Creek
Summit
Brewer Butte, Coffee Butte, Dog Butte, Gray Butte, Laundreaux Butte, No Heart Butte, Twin Buttes
Valley
Beef Draw, Fine Weather Draw, Olson Draw, Talcut Draw
| Race | Population |
| American Indian |  4,446 |
| White | 1,533 |
| Mixed | 95 |
| Black | 21 |
| Asian | 15 |
| Hawaiian & Pacific Islander | 2 |
| Additional population tables : | |
| State population table | |
| South Dakota population by county | |