Lyman County South Dakota - Government Site
Population: 3,929
Area: 1640 square miles
County Seat: Kennebec
Area Code(s) in use: 605
Time Zone: CST
Adjacent counties:
Brule Buffalo Charles Mix Gregory Hughes Hyde Jones Mellette Stanley Tripp
Airport
Anderson Private Airstrip, Dyson Brothers Landing Field, Kreager Landing Field, Oller Landing Strip, Presho Municipal Airport, Smith Landing Strip, Thomas Brothers Landing Strip, Vivian Landing Strip
Bar
Bailey Island
Bend
Horseshoe Bend
Cemetery
Earling Cemetery, Hillsdale Cemetery, Hilmoe Cemetery, Holy Angels Cemetery, Holy Faith Cemetery, Iona Cemetery, Kennebec Cemetery, Medicine Creek Cemetery, Oacoma Cemetery, Prairie View Cemetery, Reliance Cemetery, Saint Marys Cemetery, Saint Michaels Cemetery, Trinity Cemetery, Vivian Cemetery
Church
Messiah Church, Saint Albans Church
Civil
City of Presho, Lyman County, Presho County (historical), Town of Kennebec, Town of Oacoma, Town of Reliance, Township of Annin, Township of Applegate, Township of Bailey, Township of Black Dog, Township of Brule, Township of Butte, Township of Dorman, Township of Earling, Township of Edna, Township of Fairland, Township of Grouse Creek, Township of Hilmoe, Township of Hope, Township of Iona, Township of Iona (historical), Township of Kennebec, Township of Lafayette, Township of Liberty, Township of Lund, Township of McClure, Township of Moore, Township of Morningside, Township of Oacoma, Township of Pleasant, Township of Pratt, Township of Presho (historical), Township of Reliance, Township of Rex, Township of Rose, Township of Rowe, Township of Sioux, Township of Stony Butte, Township of Sylvia, Township of Tracy (historical), Township of Vivian, Township of White River, Unorganized Territory of Black Dog, Unorganized Territory of McClure, Unorganized Territory of Northeast Lyman, Unorganized Territory of South Lyman
Cliff
Black Bluffs (historical), Grandpie Head (historical)
Dam
Alfred Hutchinson Dam, Alfred Urban Dam, Alkali Dam, Archie Millard Number 1 Dam, Bower Dam, Brakke Dam, Bruck Herman Dam, Byre Dam, Dale Ellis Dam, DeJong Brothers 12 Dam, DeJong Brothers 7 Dam, DeJong Brothers Number 1 Dam, DeJongs Brothers 8 Dam, Dorman Dam, Fate Dam, Floyd Sletto Dam, Gus Allen 1 Dam, Gus Allen 2 Dam, Hafner Dam, Iona Dam, Jackson Dam, John Bunker Dam, Knudson Dam, Larsen Dam, Lee Anderson Dam, Lookout Dam, Merrill Karlen Number 1 Dam, Nels Dam, Oscar Diess Dam, Reliance Dam, Straka Brothers Dam, Summit Dam, Sweeney Dam, Vivian Dam, Walcott Number 1 Dam, Wendell Gilman Dam, William Smith Dam
Flat
Gozzard Flat
Island
Bice Island, Bird Island, Brule Island (historical), Brule Island (historical), Cedar Creek Island (historical), Eagle Island, Medicine Island (historical), Phelps Island (historical), Saint Johns Island (historical)
Lake
Billman Lake, Heap Lake, Jackson Lake, Kennebec Lake
Locale
Bonds Ferry (historical), Brule Agency (historical), Cadottes Wood Yard (historical), Cavite (historical), Christensen Ranch, Close Ranch, Dirkstown (historical), Earling (historical), Edna (historical), Ellis Ranch, Fort Bouis (historical), Fort Defiance (historical), Fort Hale (historical), Fort Lookout (historical), Fort Lookout (historical), Fort Recovery (historical), Iona (historical), Lindly Ranch, Lower Brule (historical), Lower Brule Agency (historical), Lund (historical), Lyman (historical), Medicine Bulls Camp (historical), Moore (historical), Red Cloud Agency (historical), Reese Ranch, Rosebud Landing (historical), Saint Johns Wood Yard (historical), Schooler Ranch, Sharp Ranch, Sylvia (historical), Trudeaus 1794 Camp (historical)
Park
Brakke Dam State Public Shooting Area, Cedar Creek Recreation Area, Chamberlain Recreation Area, Counselor Creek Recreation Area, Fate Dam State Public Shooting Area, Good Soldier Creek Recreation Area, Iron Nation Recreation Area, Kiowa State Public Hunting Area, Lower Brule Park, Lower Brule Recreation Area, Medicine Creek Roadside Park, Narrows Recreation Area, Reliance State Game Refuge, Tailwaters Recreation Area, Trailwaters Recreation Area
Populated Place
Council House, Iona, Kennebec, Lower Brule, Lyman, Oacoma, Presho, Reliance, Vivian
Post Office
Iron Nation Post Office (historical), Lyman Post Office (historical)
Range
Iona Hills
Reserve
Lower Brule Indian Reservation
Reservoir
Brakke Dam, Byre Lake, Fate Dam, Lake Agnes, Nail Creek Lake, Nels Reservoir, Reliance Lake, Summit Reservoir
School
Allyn School, Black Dog School, Brule School, Cedar Valley School, East Cooper School, Edna School, Fairview School, Grandview School, Hieb School, Houston School, Lindley School, North Cooper School, Pleasant Hill School, Roosevelt School, Sioux School, Walker School, West Cooper School
Stream
American Crow Creek, Bad Creek, Bad Horse Creek, Big Creek, Bull Creek, Cedar Creek, Clates Creek, Counselor Creek, Davis Creek, De Smet Creek, Dipping Tank Creek, Fish Creek (historical), Fivemile Creek, Good Soldier Creek, Grouse Creek, Julius Creek, Medicine Creek, Mill Iron Creek, Mission Creek, Nail Creek, Nicholas Creek, North Fork American Crow Creek, North Fork Medicine Creek, Plum Creek, Pontoon Creek, Sedlano Creek, Short Creek, South Branch Cedar Creek, South Fork Cedar Creek, Stony Butte Creek, Straight Creek, Waterhole Creek, White River, White River, White River, Williams Creek
Summit
Lewis Hill, Medicine Butte, Red Butte, Stony Butte, Twilight Butte
Tower
KPLO Radio Tower, KTSD Radio Tower
Valley
Wagner Draw
| Race | Population |
| White |  2,386 |
| American Indian | 1,451 |
| Mixed | 78 |
| Asian | 11 |
| Black | 3 |
| Hawaiian & Pacific Islander | 0 |
| Additional population tables : | |
| State population table | |
| South Dakota population by county | |