Connecticut vs Illinois Electricity Rates (2026)
Illinois has 45.7% cheaper electricity than Connecticut. Illinois residents pay 16.27¢/kWh compared to 29.98¢/kWh in Connecticut, saving about $61.00/month on average.
Connecticut
29.98¢
per kWh
$176/mo
Illinois
16.27¢
per kWh
$115/mo
Detailed Rate Comparison
| Metric | Connecticut | Illinois | National Avg |
|---|---|---|---|
| Residential Rate | 29.98¢/kWh | 16.27¢/kWh | 17.22¢/kWh |
| Commercial Rate | 22.54¢/kWh | 11.38¢/kWh | - |
| Industrial Rate | 19.43¢/kWh | 8.14¢/kWh | - |
| Avg Monthly Bill | $176 | $115 | $134 |
| Renewable Energy | 6.0% | 13.0% | ~22% |
| Primary Source | Natural Gas | Nuclear | - |
Appliance Running Costs: Connecticut vs Illinois
Monthly cost to run common household appliances in each state.
| Appliance | CT | IL | Savings |
|---|---|---|---|
| Air Purifier | $10.79 | $5.86 | IL saves $4.94 |
| Blender | $0.36 | $0.20 | IL saves $0.16 |
| CFL Bulb (13W) | $0.94 | $0.51 | IL saves $0.43 |
| Cable / Satellite Box | $7.55 | $4.10 | IL saves $3.45 |
| Ceiling Fan | $8.09 | $4.39 | IL saves $3.70 |
| Central Air Conditioner | $251.83 | $136.67 | IL saves $115.16 |
| Chest Freezer | $17.27 | $9.37 | IL saves $7.90 |
| Clothes Dryer (Electric) | $26.98 | $14.64 | IL saves $12.34 |
| Coffee Maker | $2.02 | $1.10 | IL saves $0.93 |
| Crypto Mining Rig | $323.78 | $175.72 | IL saves $148.07 |
| Dehumidifier | $32.38 | $17.57 | IL saves $14.81 |
| Desktop Computer | $14.39 | $7.81 | IL saves $6.58 |
| Dishwasher | $16.19 | $8.79 | IL saves $7.40 |
| Electric Baseboard Heater | $89.94 | $48.81 | IL saves $41.13 |
| Electric Fireplace | $50.37 | $27.33 | IL saves $23.03 |
Bottom Line: Connecticut vs Illinois
Illinois is the more affordable state for electricity, with rates 45.7% lower than Connecticut. An average household would save about $732.00/year by living in Illinois.
Connecticut gets its electricity primarily from Natural Gas with 6.0% renewable, while Illinois relies on Nuclear with 13.0% renewable.
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Frequently Asked Questions
Is electricity cheaper in Connecticut or Illinois?
Electricity is cheaper in Illinois at 16.27¢/kWh compared to Connecticut at 29.98¢/kWh. That's a 45.7% difference, saving about $61.00/month on an average residential bill.
What is the average electricity bill in Connecticut vs Illinois?
The average monthly electricity bill is $176 in Connecticut and $115 in Illinois. The national average is $134.
Which state uses more renewable energy, Connecticut or Illinois?
Illinois has a higher renewable energy percentage at 13.0%, compared to 6.0% in Connecticut.
What are the main energy sources in Connecticut and Illinois?
Connecticut primarily uses Natural Gas, while Illinois relies on Nuclear.
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Data verified March 2026 · Source: U.S. Energy Information Administration (EIA)