Wyoming · Investor Owned
NorthWestern Energy LLC - (MT)
12.39¢ per kWh, bundled, EIA-861 2025. Average bill $98.66 at 796.3 kWh a month, across 299 customers on that row.
Wyoming averaged 13.37¢/kWh and $111.59 a month. The United States averaged 17.23¢/kWh and $150.68. State and national figures come from EIA's Average Bill file.
Revenue divided by sales, EIA-861 Sales to Ultimate Customers, 2025, released October 7, 2026. Texas wires utilities come from the Delivery Companies file. The price and bill use bundled service. Customer count: 299, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$123.90
12.39¢/kWh × 1,000 kWh. Bundled residential average, EIA-861 2025. The customer charge is already folded into this average, so it stands beside a tariff total rather than being added to it.
Annual history
| Year | ¢/kWh | Avg. bill | Avg. kWh | Customers |
|---|---|---|---|---|
| 2015 | 11.81¢ | $77.69 | 657.6 | 183 |
| 2016 | 9.92¢ | $65.65 | 661.6 | 180 |
| 2017 | 11.87¢ | $81.81 | 689.2 | 181 |
| 2018 | 11.82¢ | $81.58 | 690.1 | 181 |
| 2019 | 12.09¢ | $86.58 | 716.1 | 182 |
| 2020 | 12.30¢ | $86.98 | 707.0 | 151 |
| 2021 | 12.24¢ | $77.47 | 632.7 | 152 |
| 2022 | 12.54¢ | $88.32 | 704.6 | 167 |
| 2023 | 13.30¢ | $100.00 | 751.8 | 235 |
| 2024 | 12.83¢ | $93.82 | 731.3 | 294 |
| 2025 | 12.39¢ | $98.66 | 796.3 | 299 |
EIA-861, 2015–2025, using the same service type as the 2025 figure. A blank year means that service was not in the file.
Counties
Park, Teton.
EIA-861 Service Territory, 2025. A listed county is the county EIA recorded. It does not mean every address in the county is served. Open this utility in the bill calculator · Rate history tool