Electricity rates in South Dakota: 14.20¢ per kWh
Homes in South Dakota paid an average of 14.20¢ per kilowatt-hour from August 2025 to July 2026, 21% below the U.S. average of 17.99¢. That is the 16th-lowest of 51, between North Carolina (14.77¢) and Iowa (14.13¢).
The average South Dakota home used 986 kWh a month — the 18th-most of the 51 — so its typical bill came to $140 a month, the 18th-lowest. At the national rate the same 986 kWh would cost $37 more a month.
In July 2026, the latest month published, the South Dakota rate was 15.37¢.
| Rank | State | Average rate | Latest month | Average home use | Average bill |
|---|---|---|---|---|---|
| 34 | Mississippi | 14.77¢ | 14.54¢ | 1,160 kWh/mo | $171/mo |
| 34 | North Carolina | 14.77¢ | 15.16¢ | 1,029 kWh/mo | $152/mo |
| 36 | South Dakota | 14.20¢ | 15.37¢ | 986 kWh/mo | $140/mo |
| 37 | Iowa | 14.13¢ | 15.99¢ | 856 kWh/mo | $121/mo |
| 38 | Washington | 14.12¢ | 14.71¢ | 932 kWh/mo | $132/mo |
What a month of electricity costs in South Dakota
At 14.20¢ per kWh, every extra 100 kWh a month adds $14.20 to the monthly bill and $170 to the year. The table runs from half to twice the South Dakota average home's 986 kWh, using the same calculation as the calculator above.
| Monthly use | Per month | Per year | vs. U.S. rate (17.99¢) |
|---|---|---|---|
| 500 kWh (half the average) | $71 | $852 | −$19 |
| 986 kWh (state average) | $140 | $1,680 | −$37 |
| 1,500 kWh (1.5× the average) | $213 | $2,556 | −$57 |
| 1,950 kWh (twice the average) | $277 | $3,323 | −$74 |
South Dakota electricity through the year
The average South Dakota home's bill peaked at about $176 in July 2026 and was lowest, about $115, in October 2025. Use ran from 805 kWh in May 2026 to 1,269 kWh in January 2026, 1.6 times as much.
The rate moved too, from 12.51¢ in December 2025 to 15.73¢ in May 2026. A monthly rate includes that month's fuel and seasonal charges, which is why the calculator uses the 12-month average for a yearly estimate.
| Month | Rate | Use per home | Bill per home |
|---|---|---|---|
| Aug 2025 | 13.98¢ | 1,029 kWh | $144 |
| Sep 2025 | 14.76¢ | 853 kWh | $126 |
| Oct 2025 | 14.09¢ | 814 kWh | $115 |
| Nov 2025 | 13.81¢ | 877 kWh | $121 |
| Dec 2025 | 12.51¢ | 1,174 kWh | $147 |
| Jan 2026 | 13.60¢ | 1,269 kWh | $173 |
| Feb 2026 | 13.24¢ | 1,113 kWh | $147 |
| Mar 2026 | 14.29¢ | 1,006 kWh | $144 |
| Apr 2026 | 14.52¢ | 885 kWh | $129 |
| May 2026 | 15.73¢ | 805 kWh | $127 |
| Jun 2026 | 15.36¢ | 868 kWh | $133 |
| Jul 2026 | 15.37¢ | 1,146 kWh | $176 |
Largest electricity providers in South Dakota
Among the 10 largest providers listed, average residential rates in 2024 ran from 9.30¢ at Watertown Municipal Utilities to 14.76¢ at Black Hills Electric Coop, Inc. On the average South Dakota home's 986 kWh that is a difference of $54 a month.
These are 2024 figures, the latest final year. The South Dakota average was 12.86¢ that year and 14.20¢ over the last 12 months, up 10% — compare the providers with each other, not with today's average.
Together they serve 71% of South Dakota's 433,548 residential customers. The rates are each company's residential revenue divided by kilowatt-hours sold, so customer charges are included; a plan or tier can still differ.
| Provider | Type | Homes served | Average rate | Use per home |
|---|---|---|---|---|
| Northern States Power Co - Minnesota | Investor-owned | 92,204 | 13.87¢ | 745 kWh/mo |
| Black Hills Power, Inc. | Investor-owned | 60,951 | 14.37¢ | 767 kWh/mo |
| NorthWestern Energy | Investor-owned | 51,467 | 12.56¢ | 903 kWh/mo |
| Sioux Valley SW Elec Coop | Cooperative | 22,213 | 12.94¢ | 1,239 kWh/mo |
| Southeastern Electric Coop Inc | Cooperative | 20,160 | 12.41¢ | 1,128 kWh/mo |
| West River Electric Assn Inc | Cooperative | 18,423 | 14.25¢ | 897 kWh/mo |
| Watertown Municipal Utilities | Municipal | 11,633 | 9.30¢ | 856 kWh/mo |
| City of Brookings | Municipal | 10,544 | 11.12¢ | 807 kWh/mo |
| Black Hills Electric Coop, Inc | Cooperative | 9,227 | 14.76¢ | 1,109 kWh/mo |
| Otter Tail Power Co | Investor-owned | 9,048 | 10.93¢ | 1,023 kWh/mo |