Montana vs South Dakota: Electricity Rates & Average Bills
Side-by-side residential bills, cents-per-kWh, usage and 12-month trends — June 2026 EIA data.
Data through June 2026
EIA-826, verified Oct 11, 2026
The average residential bill in South Dakota ($133.30/mo) runs $30.86/mo (30%) higher than Montana ($102.44/mo).
Montana bill$102.44/mo#51 highest of 51
South Dakota bill$133.30/mo#36 highest of 51
US context$164.05/mostates median
The numbers, side by side
Latest month from EIA residential retail-sales data, plus each state's rank among tracked states.
| Measure | Montana | South Dakota |
|---|---|---|
| Avg monthly bill | $102.44 | $133.30 |
| Price per kWh | 15.14¢ | 15.36¢ |
| Typical usage | 677 kWh/mo | 868 kWh/mo |
| Bill rank | Highest: #51 · Price: #36 | Highest: #36 · Price: #33 |
| Bill, 12-mo change | −12.8% | −15.3% |
Montana bill trend
Average residential bill, last 12 months.
South Dakota bill trend
Average residential bill, last 12 months.
Common questions
Is Montana or South Dakota more expensive for electricity?
South Dakota is — the average residential bill there is $30.86/month higher than Montana's ($102.44/month).
How much bigger is South Dakota's bill than Montana's?
About 30% higher — $133.30 vs $102.44 per month in the latest EIA data.
Bill = residential revenue ÷ customers; price = revenue ÷ sales. See the methodology and each state's page: Montana · South Dakota.