NewInsight: Investor-owned utilities charge 23% more for power

Electricity prices in South Dakota

What homes in South Dakota pay for electricity, from EIA.

Headlines

Average price
14.3¢ a kWh
Up 8.2% on a year ago
Average bill
$140 a month
Up 7.0% on a year ago
Average use
983 kWh
A month. US 875 kWh
Price rank
36 of 51
1 is the most expensive

Over the 12 months to August 2026, South Dakota homes paid 14.3¢ a kWh, against a US average of 18.0¢.

South Dakota vs the US

South DakotaUS
Average price, 12 months to August 202614.3¢18.0¢
Price in August 202615.2¢18.2¢
Average monthly bill, 12 months$140$158
Bill in August 2026$160$209
Average monthly use983 kWh875 kWh
Price change, past year+8.2%+6.5%
Price change since 2019+24%+39%

Electricity price

Average residential price a kilowatt-hour, by month.

Up to and including August 2026

Average monthly bill

What an average home pays a month. Bills peak in summer and winter.

Up to and including August 2026

Natural gas price

Average residential price a thousand cubic feet, by month. Summer prices are high because fixed charges are spread over little gas.

Up to and including August 2026

Utilities in South Dakota

Past 12 months, utilities with 10,000 homes or more. These utilities serve 66% of homes in South Dakota; smaller utilities serve the rest.

Xcel Energy (Northern States Power Minnesota)Investor-owned15.0¢+9.5%$11695,427
Black Hills PowerInvestor-owned15.6¢+5.8%$11762,956
NorthWestern EnergyInvestor-owned14.1¢+8.8%$13152,078
Sioux Valley SW Electric CooperativeCooperative15.1¢+12%$18323,623
Southeastern Electric CooperativeCooperative13.9¢+7.6%$15921,562
West River Electric AssociationCooperative16.1¢+8.6%$14219,230
Watertown Municipal UtilitiesMunicipal9.4¢+1.7%$8411,822
City of BrookingsMunicipal11.1¢+2.3%$9511,219

Heating fuels in South Dakota: propane.