States › Montana › Carter County
Electric utilities serving Carter County, Montana
Utilities that list the county in their Form EIA-861 service territory for 2024, with each one's average price, bill and outage minutes.
4 utilities list Carter County, Montana, in the service territory they reported to EIA for 2024, the largest by residential customers statewide being Tongue River Electric Coop Inc, Southeast Electric Coop, Inc and Grand Electric Coop, Inc.
None of them has a bundled residential price in EIA's 2024 file, so the Montana average of 12.66¢ per kilowatthour is the nearest reference.
The median SAIDI they reported was 59.4 minutes per customer including major event days; the median among all Montana utilities reporting was 352.4.
The Census Bureau estimates the county's population at 1,383. 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 Montana 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 |
|---|---|---|---|---|---|---|
| Tongue River Electric Coop Inc short form | Cooperative | 5,177 | — | — | — | — |
| Southeast Electric Coop, Inc short form | Cooperative | 2,198 | — | — | — | — |
| Grand Electric Coop, Inc short form | Cooperative | 16 | — | — | — | — |
| Black Hills Power, Inc. | Investor-owned | 12 | — | — | 59.4 | 59.4 |
Ordered by residential customers in Montana. 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 Tongue River Electric Coop Inc 13.60¢, Southeast Electric Coop, Inc 12.39¢, Grand Electric Coop, Inc 13.64¢. 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 Carter County | Montana | United States |
|---|---|---|---|
| Average residential price per kWh | — | 12.66¢ | 16.48¢ |
| Average monthly residential bill | — | $107.91 | $142.26 |
| SAIDI, all events (minutes) | 59.4 median | 352.4 median | 184.5 median |
| SAIDI, without major event days | 59.4 median | 177.2 median | 99.8 median |
| Utilities counted | 4 | 14 | 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 Carter County itself.
Population: 1,383 (U.S. Census Bureau, Vintage 2025 estimate). Statewide, residential sales came to 4,980 kWh per resident in 2024.
Other Montana counties
- Beaverhead County 2
- Big Horn County 8
- Blaine County 5
- Broadwater County 3
- Carbon County 6
- Cascade County 4
- Chouteau County 5
- Custer County 6
- Daniels County 3
- Dawson County 6
- Deer Lodge County 3
All 56 counties and every Montana utility
Questions and answers
Who provides electricity in Carter County?
Tongue River Electric Coop Inc, Southeast Electric Coop, Inc, Grand Electric Coop, Inc and Black Hills Power, Inc. 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 Carter County?
EIA has no county-level prices, and none of the utilities listed has a bundled residential price in the 2024 file. The Montana average was 12.66¢ per kilowatthour.
How reliable is power in Carter County?
Reliability is reported per utility, not per county. The utilities listed reported a median of 59.4 minutes of interruption per customer in 2024 including major event days and 59.4 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.