Illinois vs South Dakota Electricity Rates (2026)
South Dakota has 15.6% cheaper electricity than Illinois. South Dakota residents pay 13.74¢/kWh compared to 16.27¢/kWh in Illinois, saving about $18.00/month on average.
Illinois
16.27¢
per kWh
$115/mo
South Dakota
13.74¢
per kWh
$133/mo
Detailed Rate Comparison
| Metric | Illinois | South Dakota | National Avg |
|---|---|---|---|
| Residential Rate | 16.27¢/kWh | 13.74¢/kWh | 17.22¢/kWh |
| Commercial Rate | 11.38¢/kWh | 11.52¢/kWh | - |
| Industrial Rate | 8.14¢/kWh | 9.11¢/kWh | - |
| Avg Monthly Bill | $115 | $133 | $134 |
| Renewable Energy | 13.0% | 35.0% | ~22% |
| Primary Source | Nuclear | Wind | - |
Appliance Running Costs: Illinois vs South Dakota
Monthly cost to run common household appliances in each state.
| Appliance | IL | SD | Savings |
|---|---|---|---|
| Air Purifier | $5.86 | $4.95 | SD saves $0.91 |
| Blender | $0.20 | $0.16 | SD saves $0.03 |
| CFL Bulb (13W) | $0.51 | $0.43 | SD saves $0.08 |
| Cable / Satellite Box | $4.10 | $3.46 | SD saves $0.64 |
| Ceiling Fan | $4.39 | $3.71 | SD saves $0.68 |
| Central Air Conditioner | $136.67 | $115.42 | SD saves $21.25 |
| Chest Freezer | $9.37 | $7.91 | SD saves $1.46 |
| Clothes Dryer (Electric) | $14.64 | $12.37 | SD saves $2.28 |
| Coffee Maker | $1.10 | $0.93 | SD saves $0.17 |
| Crypto Mining Rig | $175.72 | $148.39 | SD saves $27.32 |
| Dehumidifier | $17.57 | $14.84 | SD saves $2.73 |
| Desktop Computer | $7.81 | $6.60 | SD saves $1.21 |
| Dishwasher | $8.79 | $7.42 | SD saves $1.37 |
| Electric Baseboard Heater | $48.81 | $41.22 | SD saves $7.59 |
| Electric Fireplace | $27.33 | $23.08 | SD saves $4.25 |
Bottom Line: Illinois vs South Dakota
South Dakota is the more affordable state for electricity, with rates 15.6% lower than Illinois. An average household would save about $216.00/year by living in South Dakota.
Illinois gets its electricity primarily from Nuclear with 13.0% renewable, while South Dakota relies on Wind with 35.0% renewable.
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Frequently Asked Questions
Is electricity cheaper in Illinois or South Dakota?
Electricity is cheaper in South Dakota at 13.74¢/kWh compared to Illinois at 16.27¢/kWh. That's a 15.6% difference, saving about $18.00/month on an average residential bill.
What is the average electricity bill in Illinois vs South Dakota?
The average monthly electricity bill is $115 in Illinois and $133 in South Dakota. The national average is $134.
Which state uses more renewable energy, Illinois or South Dakota?
South Dakota has a higher renewable energy percentage at 35.0%, compared to 13.0% in Illinois.
What are the main energy sources in Illinois and South Dakota?
Illinois primarily uses Nuclear, while South Dakota relies on Wind.
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Data verified March 2026 · Source: U.S. Energy Information Administration (EIA)