States › South Dakota › Grant County
Electric utilities serving Grant County, South Dakota
Utilities that list the county in their Form EIA-861 service territory for 2024, with each one's average price, bill and outage minutes.
Grant County, South Dakota, appears in the Form EIA-861 service territory of 7 utilities for 2024; Otter Tail Power Co, Montana-Dakota Utilities Co and H-D Electric Coop Inc are the largest by residential customers statewide.
Their average residential prices ran from 10.93¢ to 14.59¢ per kilowatthour, with a median of 12.76¢, against a South Dakota average of 12.86¢ and a US average of 16.48¢. Each price is the utility's figure for all of its South Dakota customers, not for this county alone.
WAPA: Western Area Power Administration lists the county too but reported no residential sales in South Dakota under its own name.
The median SAIDI they reported was 144.4 minutes per customer including major event days; the median among all South Dakota utilities reporting was 73.7.
The Census Bureau estimates the county's population at 7,534. EIA does not publish customers by county, so which utility serves a given address has to be confirmed with the utility or the state utility commission.
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. Figures are for each utility's whole South Dakota operation; EIA publishes nothing at county level.
Utilities and their 2024 figures
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Otter Tail Power Co | Investor-owned | 9,048 | 10.93¢ | $111.78 | 134.7 | 70.8 |
| Montana-Dakota Utilities Co | Investor-owned | 6,367 | 14.59¢ | $121.53 | 154.0 | 148.0 |
| H-D Electric Coop Inc short form | Cooperative | 3,829 | — | — | — | — |
| Whetstone Valley Elec Coop Inc short form | Cooperative | 3,658 | — | — | — | — |
| Codington-Clark Elec Coop, Inc short form | Cooperative | 3,457 | — | — | — | — |
| City of Big Stone City short form | Municipal | 401 | — | — | — | — |
| WAPA: Western Area Power Administration | Federal | — | — | — | — | — |
Ordered by residential customers in South Dakota. Short-form filers are small utilities that report only totals to EIA, so no residential price is available; their all-sector revenue per kWh was H-D Electric Coop Inc 10.83¢, Whetstone Valley Elec Coop Inc 11.87¢, Codington-Clark Elec Coop, Inc 9.84¢, City of Big Stone City 10.00¢. A utility with no customers shown reported its retail sales elsewhere or delivers power that other companies bill for.
Against the state and the country
| Measure, 2024 | Utilities listing Grant County | South Dakota | United States |
|---|---|---|---|
| Average residential price per kWh | 12.76¢ median | 12.86¢ | 16.48¢ |
| Average monthly residential bill | $116.66 median | $127.81 | $142.26 |
| SAIDI, all events (minutes) | 144.4 median | 73.7 median | 184.5 median |
| SAIDI, without major event days | 109.4 median | 65.1 median | 99.8 median |
| Utilities counted | 7 | 20 | 1,413 |
Outage minutes reported
SAIDI for 2024 across each utility's whole system, including major event days (paler bars: only the figure without major event days was reported). Not a measure of outages in Grant County itself.
Population: 7,534 (U.S. Census Bureau, Vintage 2025 estimate). Statewide, residential sales came to 5,529 kWh per resident in 2024.
Other South Dakota counties
- Deuel County 7
- Dewey County 2
- Douglas County 5
- Edmunds County 4
- Fall River County 4
- Faulk County 5
- Gregory County 3
- Haakon County 3
- Hamlin County 9
- Hand County 5
- Hanson County 5
- Harding County 3
All 66 counties and every South Dakota utility
Questions and answers
Who provides electricity in Grant County?
Otter Tail Power Co, Montana-Dakota Utilities Co, H-D Electric Coop Inc, Whetstone Valley Elec Coop Inc, Codington-Clark Elec Coop, Inc and City of Big Stone City and 1 more list the county in their Form EIA-861 service territory for 2024. Territories overlap, and a utility may cover only a corner of the county.
What is the electricity price in Grant County?
EIA has no county-level prices. The utilities serving the county reported average residential prices of 10.93¢ to 14.59¢ per kilowatthour across their South Dakota customers in 2024; the state average was 12.86¢.
How reliable is power in Grant County?
Reliability is reported per utility, not per county. The utilities listed reported a median of 144.4 minutes of interruption per customer in 2024 including major event days and 109.4 minutes excluding them.
Provenance
Source: U.S. Energy Information Administration, Form EIA-861 for 2024, final release: service territory file (counties by utility), sales to ultimate customers, reliability and short form files. State and US averages: Form EIA-861M workbook. Population: U.S. Census Bureau. Public domain. To confirm the utility at an address, ask the utility or the state utility commission.