States › South Dakota
State · 2024 annual, monthly to Jul 2026
South Dakota electricity prices and utilities
Households in South Dakota paid an average of 12.86¢ per kilowatthour for electricity in 2024, 22% below the US average of 16.48¢. That ranks 39th highest of the 50 states and the District of Columbia.
The average residential bill was $127.81 a month on 994 kWh of monthly use (US: $142.26 on 863 kWh), the 34th highest bill. Residential sales came to 5,529 kWh per resident over the year.
In July 2026, the latest month EIA has published, the residential average was 15.37¢, up 5.9% on July 2025; the US figure for the month was 18.31¢. Monthly figures are preliminary until EIA finalises the year.
20 respondents reported residential customers in South Dakota on the full Form EIA-861 for 2024, and 52 smaller utilities filed the short form, which has no residential breakdown. Investor-owned utilities account for 64.5% of the residential customers reported.
Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. State averages are EIA's own, from Forms EIA-861 and EIA-861M.
Residential price by month
South DakotaUnited States
Monthly pages:Jul 2026Jun 2026May 2026Apr 2026Mar 2026Feb 2026Jan 2026Dec 2025Nov 2025Oct 2025Sep 2025Aug 2025Jul 2025Jun 2025May 2025Apr 2025Mar 2025Feb 2025Jan 2025Dec 2024Nov 2024Oct 2024Sep 2024Aug 2024
Year by year
| Year | Residential ¢ | US ¢ | Commercial ¢ | Industrial ¢ | Monthly bill | kWh a month |
|---|---|---|---|---|---|---|
| 2026 to Jul 2026 | 14.50¢ | 18.19¢ | 11.65¢ | 9.46¢ | $146.86 | 1,013 |
| 2025 preliminary | 13.38¢ | 17.30¢ | 10.89¢ | 8.68¢ | $134.45 | 1,005 |
| 2024 | 12.86¢ | 16.48¢ | 10.55¢ | 8.28¢ | $127.81 | 994 |
| 2023 | 12.32¢ | 16.00¢ | 10.16¢ | 8.01¢ | $126.31 | 1,025 |
| 2022 | 12.09¢ | 15.04¢ | 10.21¢ | 8.04¢ | $127.92 | 1,058 |
| 2021 | 12.22¢ | 13.66¢ | 10.15¢ | 8.02¢ | $124.50 | 1,019 |
| 2020 | 11.75¢ | 13.15¢ | 9.65¢ | 7.79¢ | $121.77 | 1,037 |
| 2019 | 11.55¢ | 13.01¢ | 9.59¢ | 7.81¢ | $120.60 | 1,044 |
| 2018 | 11.59¢ | 12.87¢ | 9.62¢ | 7.77¢ | $121.16 | 1,045 |
| 2017 | 11.77¢ | 12.89¢ | 9.74¢ | 7.84¢ | $115.06 | 978 |
| 2016 | 11.47¢ | 12.55¢ | 9.58¢ | 7.57¢ | $112.53 | 981 |
| 2015 | 11.08¢ | 12.65¢ | 9.16¢ | 7.37¢ | $108.68 | 981 |
| 2014 | 10.47¢ | 12.52¢ | 8.89¢ | 6.99¢ | $109.45 | 1,046 |
| 2013 | 10.26¢ | 12.13¢ | 8.51¢ | 6.97¢ | $108.21 | 1,055 |
Nominal prices. The five-year change in the residential average is +11.3%. A part-year row covers January to the latest month published, so it is not comparable with full years: winter and summer months weigh differently.
Utilities by average residential price, 2024
Every filing with at least 100 bundled residential customers in South Dakota, highest average price first. Linked utilities have 1,000 or more residential customers. A multi-state utility appears with its South Dakota figures only.
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Dakota Energy Coop Inc | Cooperative | 3,224 | 15.30¢ | $246.15 | — | — |
| Black Hills Electric Coop, Inc | Cooperative | 9,227 | 14.76¢ | $163.70 | 228.7 | 102.0 |
| Montana-Dakota Utilities Co | Investor-owned | 6,367 | 14.59¢ | $121.53 | 154.0 | 148.0 |
| Black Hills Power, Inc. | Investor-owned | 60,951 | 14.37¢ | $110.22 | 57.4 | 57.4 |
| West River Electric Assn Inc | Cooperative | 18,423 | 14.25¢ | $127.85 | 43.5 | 43.5 |
| Northern States Power Co - Minnesota | Investor-owned | 92,204 | 13.87¢ | $103.33 | 100.1 | 63.6 |
| Central Electric Coop, Inc | Cooperative | 6,483 | 13.64¢ | $201.08 | — | — |
| Sioux Valley SW Elec Coop | Cooperative | 22,213 | 12.94¢ | $160.31 | 71.4 | 71.4 |
| City of Volga | Municipal | 1,075 | 12.80¢ | $115.03 | — | — |
| NorthWestern Energy | Investor-owned | 51,467 | 12.56¢ | $113.36 | 76.0 | 66.5 |
| Southeastern Electric Coop Inc | Cooperative | 20,160 | 12.41¢ | $139.98 | 71.3 | 71.3 |
| City of Madison | Municipal | 2,802 | 11.49¢ | $113.58 | — | — |
| Northern Electric Coop, Inc | Cooperative | 5,757 | 11.29¢ | $225.58 | 49.8 | 49.8 |
| City of Brookings | Municipal | 10,544 | 11.12¢ | $89.79 | 10.6 | 10.6 |
| Otter Tail Power Co | Investor-owned | 9,048 | 10.93¢ | $111.78 | 134.7 | 70.8 |
| City of Pierre | Municipal | 6,126 | 10.65¢ | $93.85 | — | — |
| Rosebud Electric Coop Inc | Cooperative | 4,856 | 10.63¢ | $116.13 | 111.6 | 95.0 |
| Nebraska Public Power District | Public power district | 1,044 | 9.73¢ | $122.05 | — | — |
| Watertown Municipal Utilities | Municipal | 11,633 | 9.30¢ | $79.62 | 3.3 | 3.3 |
| MidAmerican Energy Co | Investor-owned | 4,236 | 8.68¢ | $94.03 | 428.0 | 42.0 |
Reliability by utility, 2024
SAIDI: minutes of sustained interruption per customer over the year, including major event days (paler bars: the utility reported only the figure without major event days). Median across 14 South Dakota filings: 73.7 minutes with major event days, 65.1 without. EIA's state total: 84.7 and 62.1 minutes, with SAIFI of 0.82 interruptions per customer. Utilities use differing calculation methods, and a single storm can dominate a small utility's year.
| Year | Median SAIDI, all events | Median SAIDI, no major events | Filings | EIA state total, all events | EIA state total, no major events |
|---|---|---|---|---|---|
| 2024 | 73.7 | 65.0 | 14 | 84.7 | 62.1 |
| 2023 | 71.4 | 54.0 | 13 | 77.0 | 63.2 |
| 2022 | 131.7 | 79.3 | 13 | — | — |
| 2021 | 99.6 | 57.7 | 13 | — | — |
| 2020 | 79.9 | 70.9 | 12 | — | — |
| 2019 | 130.0 | 72.1 | 19 | — | — |
| 2018 | 83.4 | 69.2 | 19 | — | — |
| 2017 | 113.7 | 90.0 | 19 | — | — |
| 2016 | 197.6 | 83.4 | 17 | — | — |
| 2015 | 102.0 | 89.6 | 17 | — | — |
| 2014 | 92.5 | 83.4 | 15 | — | — |
| 2013 | 167.1 | 66.4 | 16 | — | — |
Sales by sector, 2024
| Sector | Sales | Share | ¢ per kWh |
|---|---|---|---|
| Residential | 5.2 TWh | 38% | 12.86¢ |
| Commercial | 5.1 TWh | 37% | 10.55¢ |
| Industrial | 3.4 TWh | 25% | 8.28¢ |
| All sectors | 13.6 TWh | 10.87¢ |
Residential sales per resident: 5,529 kWh a year, on a Census population estimate of 935,094.
Who serves South Dakota
| Ownership | Filings | Residential customers | Share | Median ¢ |
|---|---|---|---|---|
| Investor-owned utilities | 6 | 224,273 | 64.5% | 13.22¢ |
| Electric cooperatives | 8 | 90,343 | 26% | 13.29¢ |
| Municipal utilities | 5 | 32,180 | 9.3% | 11.12¢ |
| Political subdivisions and public power districts | 1 | 1,044 | 0.3% | 9.73¢ |
Customers as reported by each respondent. Where households buy energy from a retail supplier, the delivery utility and the supplier both report them, so shares describe filings, not households.
Counties
Each county page lists the utilities whose Form EIA-861 service territory includes it.
- Aurora County 5
- Beadle County 6
- Bennett County 2
- Bon Homme County 6
- Brookings County 10
- Brown County 7
- Brule County 4
- Buffalo County 3
- Butte County 4
- Campbell County 3
- Charles Mix County 5
- Clark County 6
- Clay County 4
- Codington County 7
- Corson County 4
- Custer County 3
- Davison County 4
- Day County 7
- Deuel County 7
- Dewey County 2
- Douglas County 5
- Edmunds County 4
- Fall River County 4
- Faulk County 5
- Grant County 7
- Gregory County 3
- Haakon County 3
- Hamlin County 9
- Hand County 5
- Hanson County 5
- Harding County 3
- Hughes County 4
- Hutchinson County 4
- Hyde County 3
- Jackson County 4
- Jerauld County 5
- Jones County 2
- Kingsbury County 8
- Lake County 5
- Lawrence County 3
- Lincoln County 6
- Lyman County 3
- Marshall County 7
- McCook County 4
- McPherson County 3
- Meade County 7
- Mellette County 4
- Miner County 6
- Minnehaha County 5
- Moody County 6
- Oglala Lakota County 4
- Pennington County 4
- Perkins County 3
- Potter County 3
- Roberts County 7
- Sanborn County 5
- Spink County 6
- Stanley County 3
- Sully County 4
- Todd County 3
- Tripp County 3
- Turner County 7
- Union County 7
- Walworth County 3
- Yankton County 5
- Ziebach County 4
Questions and answers
What is the average electricity price in South Dakota?
12.86¢ per kilowatthour for residential customers in 2024, against a US average of 16.48¢. Commercial customers averaged 10.55¢ and industrial customers 8.28¢. The latest monthly residential figure is 15.37¢ for July 2026 (preliminary).
What is the average electric bill in South Dakota?
$127.81 a month for residential customers in 2024, on average use of 994 kWh a month. The US average was $142.26 on 863 kWh.
Is electricity getting more expensive in South Dakota?
The average residential price was up 4.4% in 2024 on the year before and up 11.3% on 2019. These are nominal prices, not adjusted for inflation.
How reliable is electric service in South Dakota?
EIA's state total for 2024 is 84.7 minutes of interruption per customer including major event days and 62.1 minutes excluding them, across utilities reporting under any method. The median utility in the state reported 73.7 minutes including major event days.
How many electric utilities serve South Dakota?
20 respondents reported residential customers in South Dakota on the full Form EIA-861 for 2024; 20 of them have a bundled residential price. Another 52 small utilities filed the short form. 66 counties appear in service territories.
Provenance
Source: U.S. Energy Information Administration. State averages, sales and customers by year and month: Form EIA-861M sales and revenue workbook, through July 2026. Utility rows, reliability and service territories: Form EIA-861, 2024 final release. Population: U.S. Census Bureau Vintage 2025 estimates. Public domain. See methodology.