Delaware Utility Cost Calculator
The typical Delaware household used 929 kWh a month at 17.79¢ per kWh, an electric bill of roughly $165.27.
Delaware figures
Delmarva, the co-op and nine towns
Delmarva Power sold 2.9 TWh to Delaware homes in 2024 and Delaware Electric Cooperative — the state’s only co-op, with about 119,000 accounts — 1.3 TWh, while the City of Dover led nine municipal utilities. Supply competition exists too: 41 energy-only suppliers delivered 34% of the state’s retail electricity, though they served only about 38,000 accounts, and none came close to Delmarva or the co-op in household sales.
A small grid that imports
Delaware generated only 4.8 TWh in 2024 — 88% from natural gas, led by the Hay Road plant — against 11.4 TWh of retail sales, so most of its electricity arrives over the regional grid. Prices rose with the region: the July residential price went from 16.58¢ in 2025 to 18.48¢ in 2026. Coal, 11% of in-state generation a decade ago, is down to 3%.
Homes split between electric heat (40%) and gas (41%), with propane (9%) and oil (8%) common in rural areas — 22% of Delaware homes use propane for something, fourth-highest nationally. Summer still sets the high bill: $197.81 in July 2026 against $119.23 in October 2025.
Delivered fuels and help
EIA tracks both heating fuels here: $5.913 a gallon for oil and $3.731 for propane when its 2025–26 survey closed. Propane homes averaged 290 gallons a year in 2020. Outages are short by national standards — about 67 minutes per customer in 2024 excluding major events. For heating assistance, Delawareans apply through the Department of Health and Social Services.
Average Delaware electric bill by month
Revenue ÷ customers, EIA-861M [1]; highest month in teal.
Worked example
Propane heat with no gas main — a common rural Delaware arrangement — at state averages:
- Electricity: 929 kWh × 17.79¢ = $165.27
- Propane: 290 gal × $3.731 ÷ 12 = $90.17
$255.44 a month · $3,065.22 a year
Nearby states
| State | ¢/kWh | kWh/mo | Bill | $/therm |
|---|---|---|---|---|
| Maryland | 21.03¢ | 945 | $198.73 | $1.555 |
| New Jersey | 23.78¢ | 664 | $157.90 | $1.369 |
| Pennsylvania | 20.70¢ | 840 | $173.88 | $1.452 |
Official links
Figures verified against their sources on . Report a correction