Utilities listed
6
Connecticut, 2025
Homes counted
1.58 million
Residential customers
Average price
29.31 cents
Per kWh, Connecticut
Average bill
$206.46
Per month
Utilities serving Connecticut homes
| Utility | Type | Homes in CT | Cents per kWh | Monthly bill |
|---|---|---|---|---|
| Eversource Connecticut | Investor-owned | 1,193,581 | 28.88 | $195.35 |
| United Illuminating (UI) | Investor-owned | 314,909 | 35.40 | $182.78 |
| Town of Wallingford | Municipal | 21,426 | 17.78 | $151.51 |
| City of Norwich | Municipal | 18,967 | 23.35 | $147.77 |
| Groton Department of Utilities | Municipal | 12,596 | 18.05 | $133.62 |
| Bozrah Light and Power | Municipal | 2,440 | 19.75 | $169.33 |
Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Homes in CT counts only the customers in this state. Price and bill cover the utility's whole territory and bundled customers only. Delivery only means the utility carries power but does not sell it.
Who owns Connecticut's electric companies
| Type | Utilities | Homes in CT | Share of homes |
|---|---|---|---|
| Investor-owned utility | 2 | 1,508,490 | 96.5% |
| Municipal utility | 4 | 55,429 | 3.5% |
Each type is run differently. An investor-owned company answers to shareholders and a state commission. A municipal utility answers to a city. A cooperative answers to its members. That is why the same state can have very different prices and service from one address to the next.
What Connecticut utilities charge, by type
| Type | Utilities with a price | Average cents per kWh |
|---|---|---|
| Investor-owned utility | 2 | 29.97 |
| Municipal utility | 4 | 19.54 |
Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Customer-weighted average of the prices utilities report for bundled residential service. It leaves out delivery-only customers and retail providers.
Outside the investor-owned companies, the largest municipal utility is Town of Wallingford (21,426 homes).
Price differences between types come from costs, customer density and the way each type is financed, so a lower average does not decide which is better for your home.
Utilities with full profiles
These Connecticut utilities are among the 600 largest in the country, and each has a profile with its service area, reliability and rate options.
How Connecticut compares
The statewide average residential price is 29.31 cents per kWh and the average bill is $206.46 a month. See the full breakdown, rankings and neighbors on the Connecticut electricity rates page. Among utilities with at least 10,000 bundled residential customers, average prices ran from 17.78 cents at Town of Wallingford to 35.40 cents at UI.
Can you switch electric companies in Connecticut?
Households can buy energy from a licensed supplier while the local utility keeps delivering it and sending the bill. Read the Connecticut electricity providers guide. Regulation and complaints go through the Connecticut Public Utilities Regulatory Authority.
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Connecticut electric company questions
Who is the largest electric company in Connecticut?
Eversource Connecticut serves the most residential customers in Connecticut, about 1.19 million homes in 2025 (EIA Form EIA-861).
How many electric utilities are there in Connecticut?
EIA lists 6 electric utilities with residential customers in Connecticut for 2025. Most households are served by a handful of the largest ones.
Which Connecticut utility has the lowest average price?
Among Connecticut utilities with at least 10,000 bundled residential customers, Town of Wallingford had the lowest average residential price in 2025 at 17.78 cents per kWh and United Illuminating (UI) had the highest at 35.40 cents. Prices reflect the utility's costs and customer mix, so a lower price does not mean better service.
Can I choose my electric company in Connecticut?
Partly. Households can buy energy from a licensed supplier while the local utility keeps delivering it and sending the bill.