Interstate Gas Supply
Retail electricity provider · OH, PA, IL, MD
Interstate Gas Supply sells electricity supply in competitive markets. The local utility still delivers the power, maintains the lines and restores outages.
Rates by state
| State | Homes | Supply rate | Est. all-in | State avg (all-in) | Avg kWh/mo |
|---|---|---|---|---|---|
| Ohio | 175,428 | 11.55¢ | 20.54¢ | 18.25¢ | 733 |
| Pennsylvania | 69,442 | 13.90¢ | 22.57¢ | 20.70¢ | 819 |
| Illinois | 22,865 | 13.52¢ | 22.90¢ | 18.79¢ | 613 |
| Maryland | 280 | 13.28¢ | 21.52¢ | 21.03¢ | 1,036 |
Average revenue per kWh from residential customers (EIA-861 2025), adjusted to the 12 months ending July 2026. Outside Texas, "all-in" adds the state's average utility delivery charge.
Price history (Ohio)
Frequently asked questions
How much does Interstate Gas Supply charge for electricity?
Interstate Gas Supply's residential customers paid an average of 11.55¢/kWh for supply in Ohio (EIA 2025, adjusted to current state trends). That's about 20.54¢/kWh once typical utility delivery charges are added. Prices vary by plan, so check the facts label or contract summary for any offer.
Where does Interstate Gas Supply operate?
Interstate Gas Supply reported residential customers in 4 states: Ohio, Pennsylvania, Illinois, Maryland.
How many customers does Interstate Gas Supply have?
About 268,015 residential customers in total (2025).