State

South Dakota

Who serves its customers, 2025

Who serves its customers, 2025
Kind of utility	Customers	Share of customers
Investor owned	282,085	53.1%
Cooperative	110,361	20.8%
Public (municipal, state, federal, and districts)	40,411	7.6%
Other	98,017	18.5%

Customers of full-service and energy-only providers, as EIA counts them; delivery-only customers are the same people, so they are not counted twice.

U.S. Energy Information Administration · Annual Electric Power Industry Report (Form EIA-861) · data for 2025 · as of Oct 7, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0

Average price by sector, 2025

Average price by sector, 2025
Sector	Average price (cents per kWh)
Residential	13.32
Commercial	10.61
Industrial	8.65

Revenue from every kind of service over sales counted once, as EIA computes its state averages.

Capacity and generation by fuel

Capacity and generation by fuel
Fuel	Capacity	Net generation in 2025
Wind	3,456.6 MW	12,727,932 MWh
Hydro	1,648.4 MW	4,194,374 MWh
Natural gas	1,602.5 MW	2,440,585 MWh
Subbituminous coal	450 MW	2,026,133 MWh
Distillate fuel oil	288.7 MW	7,398 MWh
Solar	217.3 MW	448,846 MWh
Wood	5.4 MW	19,421 MWh
Batteries	0.8 MW	0 MWh
AB		0 MWh
Landfill gas		1,038 MWh
OG		0 MWh
Other		0 MWh

Balancing authorities serving it: MISO, SWPP, WACM.

U.S. Energy Information Administration · Annual Electric Generator Report (Form EIA-860) · data for 2025 · as of Sep 10, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0

U.S. Energy Information Administration · Power Plant Operations Report (Form EIA-923) · data for 2025 · as of Sep 11, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0

Interconnection queue, as of the end of 2025

Interconnection queue, as of the end of 2025
Type	Active capacity (MW)	Projects
Solar	2,140	11
Wind	2,902	16
Storage	700	3
Gas	1,669	7
Hybrid	810	4
Other	1,407	7

Requests still active in an interconnection queue at the end of 2025. Most never get built. Credit: Lawrence Berkeley National Laboratory and GridTracker.

Lawrence Berkeley National Laboratory and GridTracker · Queued Up: Interconnection Queue Data File (Lawrence Berkeley National Laboratory) · data for 2025 · as of May 7, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0

Utilities

Utilities
Utility	Ownership, as EIA reports it	Customers	Sales (MWh)
Northern States Power Co - Minnesota	Investor Owned	107,985	2,300,459
Adjustment 2025		98,017	2,420,364
Black Hills Power, Inc.	Investor Owned	82,900	1,526,786
NorthWestern Energy - (SD)	Investor Owned	65,396	1,656,248
Sioux Valley SW Elec Coop	Cooperative	26,164	820,488
Southeastern Electric Coop Inc - (SD)	Cooperative	24,428	839,968
West River Electric Assn Inc	Cooperative	21,332	348,596
Watertown Municipal Utilities	Municipal	14,497	394,839
City of Brookings - (SD)	Municipal	12,568	341,914
Otter Tail Power Co	Investor Owned	12,027	563,968
Black Hills Electric Coop, Inc	Cooperative	11,478	166,008
Montana-Dakota Utilities Co	Investor Owned	8,444	128,802
Central Electric Coop, Inc - (SD)	Cooperative	7,397	346,786
City of Pierre - (SD)	Municipal	7,393	162,150
Northern Electric Coop, Inc	Cooperative	6,938	300,486
Rosebud Electric Coop Inc	Cooperative	5,697	91,302
MidAmerican Energy Co	Investor Owned	5,333	315,612
Dakota Energy Coop Inc	Cooperative	3,645	241,741
City of Madison - (SD)	Municipal	3,361	96,054
Oahe Electric Coop Inc	Cooperative	3,282	333,385
City of Volga - (SD)	Municipal	1,290	70,904
Nebraska Public Power District	Political Subdivision	1,277	35,770
WAPA-- Western Area Power Administration	Federal	25	349,999

A utility with too few reported figures for its own page is listed here with what it reported.

Power plants (57)

Power plants in South Dakota, largest first
Plant	County	Nameplate capacity	Operator
Oahe	Hughes	786.1 MW	USACE-Omaha
Big Bend Dam	Buffalo	538.3 MW	USACE-Omaha
Big Stone	Grant	451 MW	Otter Tail Power Co
Angus Anson	Minnehaha	405.7 MW	Northern States Power Co - Minnesota
Astoria Station	Deuel	349 MW	Otter Tail Power Co
Deer Creek Station	Brookings	324 MW	Basin Electric Power Coop
Fort Randall	Charles Mix	320 MW	USACE-Omaha
Dakota Range Wind	Grant	304 MW	Northern States Power Co - Minnesota
Deuel Harvest Wind Energy LLC	Deuel	300 MW	Southern Power Co
Triple H Wind Project	Hyde	250.2 MW	Engie North America
Prevailing Wind Park	Yankton	220 MW	AES Distributed Energy
Groton Generation Station	Brown	216.4 MW	Basin Electric Power Coop
Buffalo Ridge II LLC	Brookings	210 MW	Avangrid Power LLC
Crowned Ridge Wind II Energy Center	Codington	200.6 MW	Northern States Power Co - Minnesota
Crowned Ridge Wind Energy Center	Codington	200.1 MW	Crowned Ridge Wind, LLC
Crocker Wind Farm	Clark	200 MW	Geronimo Power
North Bend Wind Project, LLC	Hyde	200 MW	North Bend Wind Project, LLC
Sweetland Wind Farm, LLC	Hand	200 MW	Sweetland Wind Farm, LLC
Prairie Winds SD1	Jerauld	162 MW	Basin Electric Power Coop
Tatanka Ridge	Deuel	154 MW	Tatanka Ridge LLC
Dakota Range III Wind Project	Grant	153.6 MW	Engie North America
Spirit Mound	Clay	135 MW	Basin Electric Power Coop
Wild Springs	Pennington	128 MW	Geronimo Power
Aberdeen CT	Brown	111 MW	NorthWestern Energy - (SD)
Ben French	Pennington	110 MW	Black Hills Power, Inc.
Willow Creek Wind Power LLC	Butte	105 MW	Willow Creek Wind Power LLC
Day County Wind LLC	Day	99 MW	Day County Wind LLC
Coyote Ridge	Brookings	97.4 MW	Coyote Ridge LLC
Campbell County Wind Farm	Campbell	94.3 MW	RWE Clean Energy
Beethoven Wind	Bon Homme	80 MW	NorthWestern Energy - (SD)
Fall River Solar, LLC	Fall River	80 MW	Greenbacker Renewable Energy Corporation
Bob Glanzer Generating Station	Beadle	69 MW	NorthWestern Energy - (SD)
Watertown Power Plant	Codington	67.5 MW	Missouri Basin Muni Power Agny
Wessington Springs	Jerauld	51 MW	Wessington Wind
Buffalo Ridge I LLC	Brookings	50.4 MW	Avangrid Power LLC
South Dakota Wind Energy Cente	Hyde	40.5 MW	FPL Energy South Dakota Wind LLC
Lange Generating Station	Pennington	40 MW	Black Hills Power, Inc.
Rolling Thunder Wind Farm Hybrid	Hand	25.8 MW	Clearlight Energy Holdings LP
Lake Preston	Kingsbury	24.1 MW	Otter Tail Power Co
Aurora County Wind	Aurora	20 MW	RWE Clean Energy
Brule County Wind	Brule	20 MW	RWE Clean Energy
Oak Tree Energy	Clark	19.5 MW	RWE Clean Energy
Yankton	Yankton	13.4 MW	NorthWestern Energy - (SD)
RE Solar, LLC	Spink	8.3 MW	Redfield Energy, LLC
Ft. Pierre	Stanley	6 MW	City of Fort Pierre - (SD)
POET Biorefining - Chancellor	Turner	5.4 MW	POET Biorefining- Chancellor
Valley Queen Cheese	Grant	4.5 MW	Valley Queen Cheese Factory, Inc.
Spearfish Hydro	Lawrence	4 MW	City of Spearfish - (SD)
POET Bioprocessing- Mitchell	Davison	3.9 MW	POET Bioprocessing- Mitchell
POET Biorefining - Hudson	Lincoln	3.6 MW	POET Biorefining - Hudson
Clark (SD)	Clark	2.7 MW	NorthWestern Energy - (SD)
Faulkton	Faulk	2.7 MW	NorthWestern Energy - (SD)
State Auto Insurance	Grant	1.7 MW	SLB Milbank LLC
Pierre Solar	Hughes	1 MW	Western Minnesota Mun Pwr Agny
Brookings Solar	Brookings	0 MW	Western Minnesota Mun Pwr Agny
Grant Solar, LLC	McCook	0 MW	Geronimo Power
Toronto Power Plant	Deuel	0 MW	Western Minnesota Mun Pwr Agny