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Electric utilities serving Sussex County, Delaware
Utilities that list the county in their Form EIA-861 service territory for 2024, with each one's average price, bill and outage minutes.
5 utilities list Sussex County, Delaware, in the service territory they reported to EIA for 2024, the largest by residential customers statewide being Delmarva Power, Delaware Electric Cooperative and City of Milford.
Their average residential prices ran from 14.22¢ to 17.23¢ per kilowatthour, with a median of 15.17¢, against a Delaware average of 16.57¢ and a US average of 16.48¢. Each price is the utility's figure for all of its Delaware customers, not for this county alone.
The median SAIDI they reported was 95.7 minutes per customer including major event days; the median among all Delaware utilities reporting was 90.1.
The Census Bureau estimates the county's population at 277,140. EIA does not publish customers by county, so which utility serves a given address has to be confirmed with the utility or the state utility commission.
Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. Figures are for each utility's whole Delaware operation; EIA publishes nothing at county level.
Utilities and their 2024 figures
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Delmarva Power | Investor-owned | 301,950 | 17.23¢ | $152.26 | 127.0 | 68.0 |
| Delaware Electric Cooperative | Cooperative | 104,839 | 14.22¢ | $146.66 | 95.7 | 61.3 |
| City of Milford | Municipal | 7,169 | 15.17¢ | $140.99 | 20.0 | 20.0 |
| City of Seaford short form | Municipal | 4,383 | — | — | — | — |
| City of Lewes short form | Municipal | 4,017 | — | — | — | — |
Ordered by residential customers in Delaware. Short-form filers are small utilities that report only totals to EIA, so no residential price is available; their all-sector revenue per kWh was City of Seaford 15.11¢, City of Lewes 14.64¢. A utility with no customers shown reported its retail sales elsewhere or delivers power that other companies bill for.
Against the state and the country
| Measure, 2024 | Utilities listing Sussex County | Delaware | United States |
|---|---|---|---|
| Average residential price per kWh | 15.17¢ median | 16.57¢ | 16.48¢ |
| Average monthly residential bill | $146.66 median | $150.87 | $142.26 |
| SAIDI, all events (minutes) | 95.7 median | 90.1 median | 184.5 median |
| SAIDI, without major event days | 61.3 median | 64.7 median | 99.8 median |
| Utilities counted | 5 | 34 | 1,413 |
Outage minutes reported
SAIDI for 2024 across each utility's whole system, including major event days (paler bars: only the figure without major event days was reported). Not a measure of outages in Sussex County itself.
Population: 277,140 (U.S. Census Bureau, Vintage 2025 estimate). Statewide, residential sales came to 4,882 kWh per resident in 2024.
Other Delaware counties
All 3 counties and every Delaware utility
Questions and answers
Who provides electricity in Sussex County?
Delmarva Power, Delaware Electric Cooperative, City of Milford, City of Seaford and City of Lewes list the county in their Form EIA-861 service territory for 2024. Territories overlap, and a utility may cover only a corner of the county.
What is the electricity price in Sussex County?
EIA has no county-level prices. The utilities serving the county reported average residential prices of 14.22¢ to 17.23¢ per kilowatthour across their Delaware customers in 2024; the state average was 16.57¢.
How reliable is power in Sussex County?
Reliability is reported per utility, not per county. The utilities listed reported a median of 95.7 minutes of interruption per customer in 2024 including major event days and 61.3 minutes excluding them.
Provenance
Source: U.S. Energy Information Administration, Form EIA-861 for 2024, final release: service territory file (counties by utility), sales to ultimate customers, reliability and short form files. State and US averages: Form EIA-861M workbook. Population: U.S. Census Bureau. Public domain. To confirm the utility at an address, ask the utility or the state utility commission.