State hub · 21 providers

South Dakota electricity rates by utility, 2025

South Dakota homes paid an average of 13.32¢ per kWh in 2025, the 14th lowest of 51 (50 states and D.C.), and used 984 kWh a month for an average bill of $131. Among full-service utilities, averages ran from 8.90¢ (MidAmerican Energy Co) to 16.28¢ (Dakota Energy Coop Inc).

13.32¢Avg residential ¢/kWh (2025)+0.46¢ (+3.6%) vs 2024
$131Avg monthly billU.S.: $151
984 kWhAvg monthly useU.S.: 874 kWh
15.15¢August 2026 (preliminary)August 2025: 13.90¢

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Your monthly use (kWh)

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Rate (¢ per kWh)

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Estimated bill at your rate$131/month

The same usage at each average rate
Rate	¢/kWh	Monthly bill	Yearly
South Dakota average, 2025	13.32¢	$131	$1,573
South Dakota average, 2025	13.32¢	$131	$1,573
South Dakota, August 2026 (preliminary)	15.15¢	$149	$1,789
U.S. average, 2025	17.23¢	$170	$2,035

How South Dakota compares

U.S. residential average, 2025: 17.23¢ per kWh and $151 a month. South Dakota is 23% below it.
Change since 2024: +0.46¢ (+3.6%) per kWh (U.S.: +0.76¢ (+4.6%)).
August 2026 (preliminary): 15.15¢ per kWh, against 13.90¢ in August 2025 (+1.25¢ (+9.0%)).

Every South Dakota provider with residential customers

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South Dakota residential electricity providers, 2025 (largest first)
Provider	Type	Customers	¢/kWh	Avg bill	Change vs 2024
Northern States Power Co - Minnesota	Full-service utility	94,137	13.13¢	$101	−0.73¢ (-5.3%)
Black Hills Power, Inc.	Full-service utility	67,608	15.12¢	$106	+0.75¢ (+5.2%)
NorthWestern Energy (SD)	Full-service utility	51,787	13.35¢	$125	+0.79¢ (+6.3%)
Sioux Valley SW Elec Coop	Full-service utility	22,989	13.94¢	$176	+1.01¢ (+7.8%)
Southeastern Electric Coop Inc (SD)	Full-service utility	20,959	12.98¢	$151	+0.57¢ (+4.6%)
West River Electric Assn Inc	Full-service utility	18,975	15.16¢	$136	+0.91¢ (+6.4%)
Watertown Municipal Utilities	Full-service utility	11,775	9.29¢	$82	−0.01¢ (-0.1%)
City of Brookings (SD)	Full-service utility	10,769	10.69¢	$94	−0.43¢ (-3.9%)
Black Hills Electric Coop, Inc	Full-service utility	9,415	14.79¢	$166	+0.02¢ (+0.1%)
Otter Tail Power Co	Full-service utility	9,094	11.42¢	$123	+0.49¢ (+4.5%)
Central Electric Coop, Inc (SD)	Full-service utility	6,515	14.67¢	$225	+1.02¢ (+7.5%)
Montana-Dakota Utilities Co	Full-service utility	6,348	12.99¢	$111	−1.61¢ (-11.0%)
City of Pierre (SD)	Full-service utility	6,183	10.94¢	$99	+0.30¢ (+2.8%)
Northern Electric Coop, Inc	Full-service utility	5,823	11.43¢	$239	+0.14¢ (+1.3%)
Rosebud Electric Coop Inc	Full-service utility	4,911	11.88¢	$137	+1.25¢ (+11.7%)
MidAmerican Energy Co	Full-service utility	4,236	8.90¢	$99	+0.21¢ (+2.5%)
Dakota Energy Coop Inc	Full-service utility	3,231	16.28¢	$276	+0.98¢ (+6.4%)
City of Madison (SD)	Full-service utility	2,818	12.41¢	$131	+0.93¢ (+8.1%)
Oahe Electric Coop Inc	Full-service utility	2,335	10.54¢	$170	n/a
City of Volga (SD)	Full-service utility	1,094	12.79¢	$119	−0.01¢ (-0.1%)
Nebraska Public Power District	Full-service utility	1,047	10.08¢	$124	+0.36¢ (+3.7%)

Sources

U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.

Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.