Electric companies in Connecticut
1 electric utility serves Connecticut, according to US EIA-861 service-territory filings and live outage feeds. The largest by customers is Connecticut Light & Power Co, with about 1,309,944 customers in Connecticut (US EIA-861, 2025). About 18% of the customers on file (237,830) buy their electricity from a separate retail supplier; the utility listed here still delivers it and restores outages.
Territory is filed by county, so a county can list several utilities; usually only one serves a given address, and your electric bill names it.
Find yours by ZIP code
Every electric utility in Connecticut
Largest first, by customers on its lines in Connecticut (US EIA-861, 2025). “Live” is whether MassOutage can see its outages.
| Utility | Type | Customers | Counties | Live | Report an outage |
|---|---|---|---|---|---|
| Connecticut Light & Power Co | Investor Owned | 1,309,944 | 9 | Live · county | - |
Electric utilities by county
Each county's utilities, largest in the state first. The county name opens its live outage page.
Electric companies in Connecticut: FAQ
- How many electric companies serve Connecticut?
- 1 electric utility serves Connecticut, according to US EIA-861 service-territory filings and live outage feeds.
- What is the largest electric company in Connecticut?
- Connecticut Light & Power Co, with about 1,309,944 customers in Connecticut (US EIA-861, 2025).
- Which electric company serves my address in Connecticut?
- Your electric bill names it. Service territory is filed by county, so MassOutage lists the utilities serving each Connecticut county; usually only one of them serves a given address, and a utility can tell you whether it serves yours.
- Who do I call to report a power outage in Connecticut?
- Your electric utility. MassOutage has no outage contact on file for it; check your bill or the utility's website. For a downed power line, stay at least 35 feet away and call 911.
Live power outages in Connecticut →
Data from EIA Form 861 (utility reliability), every source we read. Service territory and customer counts are each utility's own EIA-861 filing; a utility a live outage feed has reported in a county is listed there too.