South Dakota electricity rates (August 2026)

Average residential and commercial electricity prices in South Dakota from EIA's monthly utility survey, with the trend, the largest utilities and what power costs a typical homeowner.

Residential rate

15.15¢

▲ 9.0% vs a year agoper kWh, August 2026; ranks 35 of 51 (1 = highest)

Commercial rate

11.71¢

per kWh, August 2026

Average home bill

$140

per month over the last 12 months, about 983 kWh

U.S. residential average

18.16¢

South Dakota is 17% below the U.S. average.

Find your utility's rate by ZIP

South Dakota vs U.S. residential rate

Cents per kWh by month, last 36 months.

Last 12 months in South Dakota

Month	Residential	Commercial	U.S. residential	Avg kWh	Avg bill
August 2026	15.15¢	11.71¢	18.16¢	1,057	$160
July 2026	15.37¢	12.17¢	18.31¢	1,146	$176
June 2026	15.36¢	11.35¢	18.34¢	868	$133
May 2026	15.73¢	11.78¢	18.44¢	805	$127
April 2026	14.52¢	11.56¢	18.86¢	885	$129
March 2026	14.28¢	11.73¢	18.60¢	1,006	$144
February 2026	13.22¢	11.22¢	17.65¢	1,113	$147
January 2026	13.58¢	11.83¢	17.45¢	1,269	$172
December 2025	12.43¢	10.16¢	17.11¢	1,150	$143
November 2025	13.74¢	10.98¢	17.77¢	860	$118
October 2025	14.01¢	10.52¢	17.95¢	798	$112
September 2025	14.68¢	11.08¢	18.05¢	836	$123

Largest utilities in South Dakota

Residential rates for the biggest utilities in South Dakota that report monthly to EIA, ordered by number of homes served, for August 2026.

Utility	Type	Rate	Avg kWh	Avg bill	Homes
Northern States Power Co - Minnesota	Investor Owned	14.33¢	935	$134	95,427
Black Hills Power, Inc.	Investor Owned	18.19¢	836	$152	62,956
NorthWestern Energy - (SD)	Investor Owned	14.12¢	1,149	$162	52,078
Sioux Valley SW Elec Coop	Cooperative	15.95¢	1,281	$204	23,623
Southeastern Electric Coop Inc - (SD)	Cooperative	14.50¢	1,218	$177	21,562
West River Electric Assn Inc	Cooperative	16.66¢	1,097	$183	19,230
Watertown Municipal Utilities	Municipal	9.32¢	1,002	$93	11,822
City of Brookings - (SD)	Municipal	12.47¢	831	$104	11,219
Black Hills Electric Coop, Inc	Cooperative	18.20¢	933	$170	9,499
Otter Tail Power Co	Investor Owned	12.64¢	1,020	$129	9,190
Central Electric Coop, Inc - (SD)	Cooperative	18.66¢	1,272	$237	6,546
Montana-Dakota Utilities Co	Investor Owned	14.72¢	1,004	$148	6,339

What electricity adds to owning a home in South Dakota

A typical South Dakota home is valued at $317,874 (Zillow). With 10% down at this week's 7.24% 30-year rate, principal and interest come to about $1,950 a month. The average electric bill of $140 adds about 7% on top of that, or $1,683 a year. See South Dakota property tax and closing costs or run the monthly payment.

Bills follow the seasons: in South Dakota the highest-use month of the last year averaged 1,269 kWh per home and the lowest 798 kWh. Budget for the expensive months, not the average.

Common questions

What is the average electricity rate in South Dakota?

Homes in South Dakota paid an average of 15.15 cents per kWh in August 2026, 17% below the U.S. average of 18.16 cents (EIA Form 861M).

How much is the average electric bill in South Dakota?

Over the last 12 months the average South Dakota home used about 983 kWh a month and paid about $140 a month.

Have South Dakota electricity rates gone up?

The residential rate is 9.0% higher than in August 2025, when it was 13.90 cents per kWh.

What do businesses pay for electricity in South Dakota?

Commercial customers in South Dakota paid 11.71 cents per kWh in August 2026.

Electricity rates in all statesRanked table and ZIP lookup South Dakota buying costsProperty tax, transfer tax and closing costs South Dakota buyer programsDown payment help where you live

Sources: U.S. Energy Information Administration (EIA), Form EIA-861M monthly sales and revenue (state and utility data, latest month August 2026; EIA marks recent months preliminary and may revise them); ZIP-to-utility map: OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zip Code (2024), CC BY 4.0. Rates are average revenue per kWh (total bill divided by kWh sold), so they include fixed and delivery charges. EIA posts each month about eight weeks after it ends; this page checks for new data every morning.