Electric companies in South Dakota
74 electric utilities serve South Dakota, according to US EIA-861 service-territory filings and live outage feeds. The largest by customers is Northern States Power Co - Minnesota, with about 107,985 customers in South Dakota (US EIA-861, 2025).
Territory is filed by county, so a county can list several utilities; usually only one serves a given address, and your electric bill names it.
Find yours by ZIP code
Every electric utility in South Dakota
Largest first, by customers on its lines in South Dakota (US EIA-861, 2025). “Live” is whether MassOutage can see its outages.
Electric utilities by county
Each county's utilities, largest in the state first. The county name opens its live outage page.
- Aurora County
- NorthWestern Energy - (SD), Central Electric Coop, Inc - (SD), Douglas Electric Coop, Inc, City of Plankinton - (SD), WAPA-- Western Area Power Administration
- Beadle County
- NorthWestern Energy - (SD), Northern Electric Coop, Inc, Dakota Energy Coop Inc, Codington-Clark Elec Coop, Inc, Kingsbury Electric Coop, Inc, WAPA-- Western Area Power Administration, NorthWestern Energy
- Bennett County
- LaCreek Electric Assn, Inc, Cherry-Todd Electric Coop, Inc, WAPA-- Western Area Power Administration
- Bon Homme County
- NorthWestern Energy - (SD), Southeastern Electric Coop Inc - (SD), Bon Homme Yankton El Assn, Inc, Charles Mix Electric Assn, Inc, City of Tyndall - (SD), WAPA-- Western Area Power Administration
- Brookings County
- Sioux Valley SW Elec Coop, City of Brookings - (SD), Otter Tail Power Co, H-D Electric Coop Inc, City of Volga - (SD), Kingsbury Electric Coop, Inc, City of Arlington - (SD), City of Aurora - (SD), City of White - (SD), WAPA-- Western Area Power Administration
- Brown County
- NorthWestern Energy - (SD), Montana-Dakota Utilities Co, Northern Electric Coop, Inc, Lake Region Electric Assn, Inc - (SD), City of Groton - (SD), City of Hecla, WAPA-- Western Area Power Administration, NorthWestern Energy
- Brule County
- NorthWestern Energy - (SD), Central Electric Coop, Inc - (SD), Charles Mix Electric Assn, Inc, WAPA-- Western Area Power Administration
- Buffalo County
- Central Electric Coop, Inc - (SD), Dakota Energy Coop Inc, WAPA-- Western Area Power Administration
- Butte County
- Black Hills Power, Inc., Butte Electric Coop, Inc, Grand Electric Coop, Inc, WAPA-- Western Area Power Administration
- Campbell County
- Montana-Dakota Utilities Co, Cam Wal Electric Coop, Inc, WAPA-- Western Area Power Administration
- Charles Mix County
- NorthWestern Energy - (SD), Charles Mix Electric Assn, Inc, Douglas Electric Coop, Inc, Town of Pickstown - (SD), WAPA-- Western Area Power Administration
- Clark County
- NorthWestern Energy - (SD), Northern Electric Coop, Inc, H-D Electric Coop Inc, Codington-Clark Elec Coop, Inc, Kingsbury Electric Coop, Inc, WAPA-- Western Area Power Administration
- Clay County
- Southeastern Electric Coop Inc - (SD), City of Vermillion - (SD), Clay-Union Electric Corp, WAPA-- Western Area Power Administration
- Codington County
- NorthWestern Energy - (SD), Watertown Municipal Utilities, Otter Tail Power Co, H-D Electric Coop Inc, Whetstone Valley Elec Coop Inc, Codington-Clark Elec Coop, Inc, WAPA-- Western Area Power Administration
- Corson County
- Montana-Dakota Utilities Co, Moreau-Grand Electric Coop Inc, Grand Electric Coop, Inc, City of McLaughlin - (SD)
- Custer County
- Black Hills Power, Inc., Black Hills Electric Coop, Inc, WAPA-- Western Area Power Administration
- Davison County
- NorthWestern Energy - (SD), Central Electric Coop, Inc - (SD), Douglas Electric Coop, Inc, WAPA-- Western Area Power Administration, NorthWestern Energy
- Day County
- NorthWestern Energy - (SD), Otter Tail Power Co, Montana-Dakota Utilities Co, Northern Electric Coop, Inc, Codington-Clark Elec Coop, Inc, Lake Region Electric Assn, Inc - (SD), WAPA-- Western Area Power Administration
- Deuel County
- NorthWestern Energy - (SD), Sioux Valley SW Elec Coop, Otter Tail Power Co, H-D Electric Coop Inc, Whetstone Valley Elec Coop Inc, Codington-Clark Elec Coop, Inc, WAPA-- Western Area Power Administration
- Douglas County
- NorthWestern Energy - (SD), Southeastern Electric Coop Inc - (SD), Charles Mix Electric Assn, Inc, Douglas Electric Coop, Inc, WAPA-- Western Area Power Administration
- Edmunds County
- NorthWestern Energy - (SD), Montana-Dakota Utilities Co, Northern Electric Coop, Inc, FEM Electric Assn, Inc, WAPA-- Western Area Power Administration
- Fall River County
- Black Hills Power, Inc., Black Hills Electric Coop, Inc, WAPA-- Western Area Power Administration, Niobrara Electric Assn, Inc, Black Hills Energy
- Faulk County
- NorthWestern Energy - (SD), Montana-Dakota Utilities Co, Northern Electric Coop, Inc, Dakota Energy Coop Inc, FEM Electric Assn, Inc
- Grant County
- Otter Tail Power Co, Montana-Dakota Utilities Co, H-D Electric Coop Inc, Whetstone Valley Elec Coop Inc, Codington-Clark Elec Coop, Inc, City of Big Stone City - (SD), WAPA-- Western Area Power Administration
- Gregory County
- Rosebud Electric Coop Inc, City of Burke - (SD), WAPA-- Western Area Power Administration
- Haakon County
- West River Electric Assn Inc, West Central Electric Coop Inc - (SD), WAPA-- Western Area Power Administration
- Hamlin County
- NorthWestern Energy - (SD), Sioux Valley SW Elec Coop, Otter Tail Power Co, H-D Electric Coop Inc, Codington-Clark Elec Coop, Inc, Kingsbury Electric Coop, Inc, City of Estelline - (SD), City of Bryant - (SD), WAPA-- Western Area Power Administration
- Hand County
- NorthWestern Energy - (SD), Northern Electric Coop, Inc, Dakota Energy Coop Inc, City of Miller - (SD), WAPA-- Western Area Power Administration
- Hanson County
- Northern States Power Co - Minnesota, NorthWestern Energy - (SD), Southeastern Electric Coop Inc - (SD), Central Electric Coop, Inc - (SD), WAPA-- Western Area Power Administration
- Hughes County
- NorthWestern Energy - (SD), City of Pierre - (SD), Oahe Electric Coop Inc, WAPA-- Western Area Power Administration
- Hutchinson County
- Northern States Power Co - Minnesota, NorthWestern Energy - (SD), Southeastern Electric Coop Inc - (SD), Bon Homme Yankton El Assn, Inc, Douglas Electric Coop, Inc, WAPA-- Western Area Power Administration
- Hyde County
- NorthWestern Energy - (SD), Dakota Energy Coop Inc, WAPA-- Western Area Power Administration
- Jackson County
- West River Electric Assn Inc, West Central Electric Coop Inc - (SD), LaCreek Electric Assn, Inc, WAPA-- Western Area Power Administration
- Jerauld County
- NorthWestern Energy - (SD), Central Electric Coop, Inc - (SD), Dakota Energy Coop Inc, City of Wessington Springs, WAPA-- Western Area Power Administration
- Kingsbury County
- NorthWestern Energy - (SD), Sioux Valley SW Elec Coop, Otter Tail Power Co, Dakota Energy Coop Inc, Codington-Clark Elec Coop, Inc, Kingsbury Electric Coop, Inc, City of Arlington - (SD), City of Badger - (SD), WAPA-- Western Area Power Administration
- Lake County
- Northern States Power Co - Minnesota, Sioux Valley SW Elec Coop, Southeastern Electric Coop Inc - (SD), Otter Tail Power Co, City of Madison - (SD), WAPA-- Western Area Power Administration
- Lawrence County
- Black Hills Power, Inc., Black Hills Electric Coop, Inc, Butte Electric Coop, Inc, Black Hills Energy
- Lincoln County
- Northern States Power Co - Minnesota, Southeastern Electric Coop Inc - (SD), MidAmerican Energy Co, Clay-Union Electric Corp, City of Beresford, WAPA-- Western Area Power Administration
- Lyman County
- West Central Electric Coop Inc - (SD), Rosebud Electric Coop Inc, WAPA-- Western Area Power Administration
- Marshall County
- NorthWestern Energy - (SD), Otter Tail Power Co, Northern Electric Coop, Inc, Lake Region Electric Assn, Inc - (SD), Traverse Electric Coop, Inc, Town of Langford- (SD), WAPA-- Western Area Power Administration
- McCook County
- Northern States Power Co - Minnesota, Sioux Valley SW Elec Coop, Southeastern Electric Coop Inc - (SD), WAPA-- Western Area Power Administration
- McPherson County
- Montana-Dakota Utilities Co, Northern Electric Coop, Inc, FEM Electric Assn, Inc, WAPA-- Western Area Power Administration
- Meade County
- Black Hills Power, Inc., West River Electric Assn Inc, Black Hills Electric Coop, Inc, Butte Electric Coop, Inc, Grand Electric Coop, Inc, City of Faith - (SD), WAPA-- Western Area Power Administration
- Mellette County
- West Central Electric Coop Inc - (SD), LaCreek Electric Assn, Inc, Rosebud Electric Coop Inc, Cherry-Todd Electric Coop, Inc
- Miner County
- Northern States Power Co - Minnesota, Sioux Valley SW Elec Coop, Southeastern Electric Coop Inc - (SD), Central Electric Coop, Inc - (SD), Dakota Energy Coop Inc, City of Howard - (SD), WAPA-- Western Area Power Administration
- Minnehaha County
- Northern States Power Co - Minnesota, Sioux Valley SW Elec Coop, Southeastern Electric Coop Inc - (SD), City of Sioux Falls - (SD), WAPA-- Western Area Power Administration
- Moody County
- Northern States Power Co - Minnesota, Sioux Valley SW Elec Coop, Otter Tail Power Co, City of Flandreau, City of Colman - (SD), WAPA-- Western Area Power Administration
- Oglala Lakota County
- West River Electric Assn Inc, Black Hills Electric Coop, Inc, LaCreek Electric Assn, Inc, Nebraska Public Power District
- Pennington County
- Black Hills Power, Inc., West River Electric Assn Inc, Black Hills Electric Coop, Inc, WAPA-- Western Area Power Administration, Black Hills Energy
- Perkins County
- Montana-Dakota Utilities Co, Grand Electric Coop, Inc, WAPA-- Western Area Power Administration
- Potter County
- Montana-Dakota Utilities Co, Cam Wal Electric Coop, Inc, WAPA-- Western Area Power Administration
- Roberts County
- Otter Tail Power Co, Montana-Dakota Utilities Co, Whetstone Valley Elec Coop Inc, Codington-Clark Elec Coop, Inc, Lake Region Electric Assn, Inc - (SD), Traverse Electric Coop, Inc, WAPA-- Western Area Power Administration
- Sanborn County
- Northern States Power Co - Minnesota, NorthWestern Energy - (SD), Central Electric Coop, Inc - (SD), Dakota Energy Coop Inc, WAPA-- Western Area Power Administration
- Spink County
- NorthWestern Energy - (SD), Northern Electric Coop, Inc, Dakota Energy Coop Inc, Codington-Clark Elec Coop, Inc, Lake Region Electric Assn, Inc - (SD), WAPA-- Western Area Power Administration
- Stanley County
- West Central Electric Coop Inc - (SD), City of Fort Pierre - (SD), WAPA-- Western Area Power Administration
- Sully County
- Dakota Energy Coop Inc, Oahe Electric Coop Inc, City of Onida - (SD), WAPA-- Western Area Power Administration
- Todd County
- LaCreek Electric Assn, Inc, Cherry-Todd Electric Coop, Inc, WAPA-- Western Area Power Administration
- Tripp County
- Rosebud Electric Coop Inc, Winner Municipal Utility, WAPA-- Western Area Power Administration
- Turner County
- Northern States Power Co - Minnesota, NorthWestern Energy - (SD), Sioux Valley SW Elec Coop, Southeastern Electric Coop Inc - (SD), Clay-Union Electric Corp, City of Parker - (SD), WAPA-- Western Area Power Administration
- Union County
- Southeastern Electric Coop Inc - (SD), MidAmerican Energy Co, Clay-Union Electric Corp, Union County Electric Coop Inc, City of Beresford, City of Elk Point, WAPA-- Western Area Power Administration
- Walworth County
- Montana-Dakota Utilities Co, Cam Wal Electric Coop, Inc, WAPA-- Western Area Power Administration
Electric companies in South Dakota: FAQ
- How many electric companies serve South Dakota?
- 74 electric utilities serve South Dakota, according to US EIA-861 service-territory filings and live outage feeds.
- What is the largest electric company in South Dakota?
- Northern States Power Co - Minnesota, with about 107,985 customers in South Dakota (US EIA-861, 2025).
- Which electric company serves my address in South Dakota?
- Your electric bill names it. Service territory is filed by county, so MassOutage lists the utilities serving each South Dakota county; usually only one of them serves a given address, and a utility can tell you whether it serves yours.
- Who do I call to report a power outage in South Dakota?
- Your electric utility. MassOutage has an outage phone line, report page or outage map on file for 0 of the 74 utilities serving South Dakota, listed above; for the others, check your bill or the utility's website. For a downed power line, stay at least 35 feet away and call 911.
Live power outages in South Dakota →
Data from EIA Form 861 (utility reliability), every source we read. Service territory and customer counts are each utility's own EIA-861 filing; a utility a live outage feed has reported in a county is listed there too.