South Dakota electricity rates

Average bill: $131.10
All-in price: 13.32¢
Average use: 984.1 kWh
Customers: 446,014

EIA-861 Average Bill, residential, 2025, released October 7, 2026. July 2026 residential price in Table 5.6.A was 15.37¢/kWh. July 2025 was 14.52¢/kWh. Table retrieved October 10, 2026.

Bundled and energy utilities

Larger utilities, sorted by the 2025 all-in price of the primary service. Delivery-only utilities are in the next section.

Utility	Service	¢/kWh	Bill	Customers
Watertown Municipal Utilities	Bundled	9.29¢	$82.26	11,775
City of Brookings - (SD)	Bundled	10.69¢	$94.09	10,769
Southeastern Electric Coop Inc - (SD)	Bundled	12.98¢	$151.37	20,959
Northern States Power Co - Minnesota	Bundled	13.13¢	$101.24	94,137
NorthWestern Energy - (SD)	Bundled	13.35¢	$125.34	51,787
Sioux Valley SW Elec Coop	Bundled	13.94¢	$176.42	22,989
Black Hills Power, Inc.	Bundled	15.12¢	$105.88	67,608
West River Electric Assn Inc	Bundled	15.16¢	$135.78	18,975

Lowest in this list: Watertown Municipal Utilities at 9.29¢/kWh. Highest: West River Electric Assn Inc at 15.16¢/kWh.

Delivery-only utilities

Delivery charges reported to EIA. In Texas, this is the wires utility, separate from the retail plan.

No delivery-only utility in this state is in the ranking above.

EIA state adjustment

Form EIA-861 includes a balancing row for South Dakota, utility number 99999. The sales file names that row Adjustment 2025. It is not a company, the ownership field is blank, and the service-territory file lists no counties. The bundled figure on that row is 13.41¢/kWh, $168.41 a month, at 1,256.1 kWh, across 64,085 customers. Read the adjustment row.

Smaller utilities (14)

Listed for reference and left out of the rankings above. Most serve fewer than 10,000 residential customers.