Which electric company serves my address in Delaware?

Your electric bill names it. Service territory is filed by county, so MassOutage lists the utilities serving each Delaware 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 Delaware?

Your electric utility. MassOutage has an outage phone line, report page or outage map on file for 0 of the 11 utilities serving Delaware, listed above; for the others, check your bill or the utility's website. For a downed power line, stay at least 35 feet away and call 911.

Electric companies in Delaware

11 electric utilities serve Delaware, according to US EIA-861 service-territory filings and live outage feeds. The largest by customers is Delmarva Power, with about 343,380 customers in Delaware (US EIA-861, 2025). About 7% of the customers on file (38,036) 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 Delaware

Largest first, by customers on its lines in Delaware (US EIA-861, 2025). “Live” is whether MassOutage can see its outages.

Utility	Type	Customers	Counties	Live	Report an outage
Delmarva Power	Investor Owned	343,380	3	Live · county	-
Delaware Electric Cooperative	Cooperative	122,301	2	Outages only	-
City of Dover - (DE)	-	25,346	1	No live feed	-
City of Newark - (DE)	Municipal	13,486	1	No live feed	-
Town of Middletown - (DE)	-	10,333	1	No live feed	-
City of Milford - (DE)	Municipal	9,096	2	No live feed	-
Town of Smyrna - (DE)	-	6,546	2	No live feed	-
City of Seaford- (DE)	Municipal	4,474	1	No live feed	-
City of Lewes - (DE)	-	4,087	1	No live feed	-
New Castle Municipal Serv Comm	Municipal	2,952	1	No live feed	-
Town of Clayton - (DE)	-	1,826	1	No live feed	-

Electric utilities by county

Each county's utilities, largest in the state first. The county name opens its live outage page.

Kent County: Delmarva Power, Delaware Electric Cooperative, City of Dover - (DE), City of Milford - (DE), Town of Smyrna - (DE), Town of Clayton - (DE)
New Castle County: Delmarva Power, City of Newark - (DE), Town of Middletown - (DE), Town of Smyrna - (DE), New Castle Municipal Serv Comm
Sussex County: Delmarva Power, Delaware Electric Cooperative, City of Milford - (DE), City of Seaford- (DE), City of Lewes - (DE)

Electric companies in Delaware: FAQ

How many electric companies serve Delaware?: 11 electric utilities serve Delaware, according to US EIA-861 service-territory filings and live outage feeds.
What is the largest electric company in Delaware?: Delmarva Power, with about 343,380 customers in Delaware (US EIA-861, 2025).
Which electric company serves my address in Delaware?: Your electric bill names it. Service territory is filed by county, so MassOutage lists the utilities serving each Delaware 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 Delaware?: Your electric utility. MassOutage has an outage phone line, report page or outage map on file for 0 of the 11 utilities serving Delaware, listed above; for the others, 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 Delaware →

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.