The average electric bill in Delaware, and what it conceals
The average Delaware residential electric bill is $176.55 a month, the product of an average price of 19.38 cents per kilowatt-hour (May 2026) and average usage of 911 kWh a month. Nationally the figures are 18.44 cents, 863 kWh, and $159.14. Delaware is about five percent above the national rate and about six percent above national usage, and those two modest premiums compound into a bill roughly eleven percent higher than average.
What makes Delaware unusual is not the size of the number but the fact that a single state average is being asked to describe three genuinely different arrangements. A New Castle County household on Delmarva Power can buy its electricity from a competitive supplier. A household outside Georgetown served by the Delaware Electric Cooperative is a member-owner of its utility and cannot shop. A household in Newark, Dover, Lewes, or Milford is served by a city-run system whose rates are set by a local body. Those are not variations on a theme; they are different markets with different governance, different rate designs, and different levers available to the customer.
The geography splits the same way. Northern New Castle County is suburban and industrial, with older housing and more natural gas service. Kent and Sussex are rural and coastal, with newer construction, far more electric heating, and a large stock of second homes near the Atlantic beaches.
A state average smears all of that together. To get a figure that applies to your house, take your own twelve-month kilowatt-hour history and run it through the electricity bill calculator rather than reasoning from $176.55.
Why Delaware electricity costs 19.38 cents per kilowatt-hour
Delaware sits inside PJM, the regional grid operator covering the mid-Atlantic and much of the Midwest, and the state's supply price is largely a PJM price. Gas-fired generation typically sets the marginal cost of energy across that footprint, so Delaware's commodity cost tracks natural gas rather than any local resource. Delaware generates far less than it consumes and imports the balance, which means transmission is not incidental here; it is the delivery mechanism for most of the state's power.
Two structural pressures push the number above the national average. The first is capacity. PJM runs a forward auction that procures a commitment from generators to be available in future years, and the results of recent auctions have been widely reported as clearing far above prior levels as load growth outpaced new supply. Capacity costs flow through to customers, and they arrive whether or not you used more electricity.
The second is the Delmarva Peninsula itself. Delaware, the Eastern Shore of Maryland, and Virginia's Eastern Shore hang off the main grid on a limited set of transmission paths. A peninsula is expensive to serve: fewer routes in, a long thin service territory, and salt air that corrodes hardware faster than inland conditions do. Coastal exposure adds storm risk from both nor'easters and tropical systems tracking up the seaboard, and storm hardening is a permanent capital program rather than an occasional expense.
Delaware also participates in the Regional Greenhouse Gas Initiative, the multi-state carbon allowance market for power plants, and maintains a renewable portfolio standard. Both are policy costs embedded in the price of power rather than separate charges most customers notice. Together these explain a rate modestly, not dramatically, above the national figure.
Why the average Delaware home uses 911 kWh a month
Delaware sits on a climate boundary and pays for both sides of it. Winters are cold enough to require real heating; summers are hot and, more importantly, humid enough that air conditioners spend much of their energy removing moisture rather than lowering temperature. Few states have to fund both a genuine heating season and a long cooling season, and Delaware does.
Heating fuel is the biggest driver of the usage figure. Natural gas distribution is concentrated in northern New Castle County and the larger towns. Across much of Kent and Sussex there is no gas main, which leaves propane, fuel oil, or electricity. A great deal of newer downstate construction went in with heat pumps, and older or cheaper construction with electric resistance heat, which is the most expensive way to heat a house per unit of delivered warmth. Electric water heating is common for the same reason. Where a Connecticut household's winter energy shows up on an oil delivery ticket, a Sussex County household's shows up on the electric bill.
Housing stock pushes the same direction. Sussex County has absorbed substantial new single-family construction, much of it in retirement and second-home communities, and new houses are larger than old ones. Larger conditioned volume means more cooling load, more standby load, and more appliances. The beach communities add a distinct pattern: properties that draw almost nothing for eight months and then run air conditioning, laundry, and hot water at holiday-weekend intensity for the rest.
If you want to know which of your own appliances is responsible for the difference between your bill and the state average, the appliance energy cost calculator will price individual loads at Delaware's rate.
What you can actually control: who can shop in Delaware and who cannot
Delaware has retail electric choice, but the sentence needs an immediate qualification that most national summaries omit: choice applies to Delmarva Power customers. If you are served by the Delaware Electric Cooperative or by one of the municipal systems, you are not in the competitive market and no supplier can enrol you. This is the single most useful thing to establish before spending any time comparing offers, and the answer is on your bill.
For Delmarva customers, the default supply product is Standard Offer Service, which the utility procures in advance through regulator-supervised solicitations. Delivery remains Delmarva's regardless of what you do. Only supply is competitive, and only supply can be saved on. The supply versus delivery guide explains how the split appears on a statement.
Delaware's usage profile changes which traps bite hardest. At 911 kWh a month, the state average sits close to the 1,000 kWh benchmark that suppliers commonly use to illustrate their rates, so quoted prices are less distorted here than in low-usage jurisdictions. That is a genuine advantage, and it makes the remaining traps easier to spot:
- Fixed monthly fees. Still worth converting into cents per kWh at your own usage, not at the benchmark.
- Introductory rates that expire into variable pricing. The rate after the promotional term is the rate you will pay for most of the relationship. Ask what it is and how it is set.
- Bill-credit plans. A credit awarded only above a usage threshold rewards you for consuming more, and quietly penalises shoulder months when your usage falls below the line.
- Early termination fees. These remove your ability to leave a contract that has stopped being competitive.
Co-op and municipal customers have different levers rather than none. Cooperative members elect the board that sets rates and may receive capital credits when margins allow; municipal customers take their case to a city council. Both often run voluntary peak-reduction programs, an unglamorous way to hold down the wholesale costs everyone shares. More in our deregulated states overview.
The utilities that serve Delaware, and how they differ structurally
Three ownership models operate side by side in a state you can drive across in two hours.
Delmarva Power, a subsidiary of Exelon, is the investor-owned utility. It serves most of New Castle County and substantial parts of Kent and Sussex, and it also operates across the Maryland portion of the peninsula. Its rates are set by the Delaware Public Service Commission in rate cases, it earns an authorised return on distribution investment, and its customers are the ones with access to competitive supply.
Delaware Electric Cooperative is member-owned. It serves a large rural and coastal territory concentrated in Kent and Sussex, and it exists to serve its members rather than shareholders. Governance runs through an elected board rather than a state commission, margins can be returned to members as capital credits, and the co-op has long run voluntary peak-alert programs that ask members to reduce load at system peaks. Cooperatives were formed to electrify areas investor-owned utilities found uneconomic, which is why the co-op's territory looks the way it does.
Municipal Electric Corporation of Delaware is not a retail utility. It is a joint action agency: a wholesale buyer that aggregates the power needs of Delaware's municipal electric systems so that small city utilities can purchase at scale. The retail relationship stays with the town, and the town's council sets the rates.
The structural difference that matters is who decides what you pay. For Delmarva, a state regulator does, in an adversarial proceeding with intervenors. For the co-op, an elected board. For a municipal, local officials, and the utility's margins may support the town's general fund. Rate design differs accordingly, with municipals and cooperatives often using simpler structures and different fixed-charge levels than an investor-owned tariff.
Beach houses, seasonal load, and why Delaware averages mislead
Sussex County's Atlantic coast gives Delaware a load pattern most small states do not have. A large stock of rental and second-home property is effectively dormant for much of the year, then runs at full intensity for the summer. That drags the state's average monthly consumption down, because dormant months are counted, and it sharpens the summer peak, because the coastal population multiplies while the distribution system serving it does not.
For an owner, the practical implication is that a seasonal property is billed on a structure designed for continuous occupancy. Fixed customer charges accrue every month whether or not anyone is there. On a supply contract, a plan with a monthly fee or a usage-threshold bill credit is a poor fit for a property with eight near-zero months, because the fee is paid twelve times and the credit is earned three or four. Owners of seasonal property should evaluate any offer on annual total cost rather than on a summer month.
The second Delaware wrinkle is heating fuel arithmetic. In much of Kent and Sussex the realistic choice is propane, oil, or electricity, and the answer turns on equipment rather than fuel price alone. A modern heat pump delivers several units of heat per unit of electricity; electric resistance baseboard delivers one. Two houses on the same rate with the same insulation can have winter bills differing by a factor of two on that basis alone. Before blaming the rate, establish what is actually heating the building.
Frequently asked questions
Can I choose my electricity supplier in Delaware?
Only if Delmarva Power is your utility. Delaware's retail choice program covers Delmarva customers, who may buy generation supply from a competitive supplier while Delmarva continues to deliver the power and handle outages. Customers of the Delaware Electric Cooperative and of the state's municipal electric systems are outside the competitive market and cannot switch suppliers. Check the utility name on your bill before responding to any offer. Even for Delmarva customers, switching affects only the supply portion of the bill; delivery charges are unchanged regardless of which supplier you pick, so shopping addresses part of the total rather than all of it.
What is Standard Offer Service in Delaware?
Standard Offer Service is the default electricity supply that Delmarva Power provides to customers who have not chosen a competitive supplier. The utility procures the power in advance through solicitations supervised by the Delaware Public Service Commission and passes the cost through without markup. It is not a penalty rate for failing to shop; it is a regulated benchmark, and it is the number any competitive offer should be compared against. Because it is procured ahead of time, it changes in steps on a schedule rather than moving continuously with the wholesale market, which is why a large group of customers can see the same change on the same day.
Why is my Delaware electric bill so much higher in summer?
Humidity as much as heat. A mid-Atlantic summer forces air conditioners to remove large amounts of moisture from the air, which consumes energy without lowering the thermostat reading, so the system runs longer than the outdoor temperature alone would predict. Cooling is usually the largest single load in a Delaware home during July and August. Beyond that, longer daylight does not reduce demand the way it does in heating months, pools and dehumidifiers run continuously downstate, and coastal properties that were nearly dormant in winter are fully occupied. Budget or levelized billing can smooth the swing without changing the annual total.
How much electricity does the average Delaware home use?
About 911 kilowatt-hours a month, modestly above the national average of 863. The state has both a real heating season and a long, humid cooling season, and much of Kent and Sussex has no natural gas distribution, which pushes heating and water heating onto the electric meter. Homes with electric resistance heat run considerably higher in winter than homes with heat pumps, and newer, larger downstate construction uses more than older housing in northern New Castle County. Seasonal coastal properties pull the state average down by contributing many near-empty months alongside a small number of very heavy ones.
Do Delaware Electric Cooperative members have any way to lower their rates?
Not by switching suppliers, but the co-op model gives members influence that investor-owned customers do not have. Members elect the board that approves rates, can attend meetings, and may receive capital credits when the cooperative's margins exceed what it needs. The co-op also runs voluntary peak-reduction programs asking members to cut load during system peak hours, which helps hold down the wholesale capacity and energy costs that all members ultimately pay. Beyond governance, the ordinary levers apply: heating equipment, water heating, insulation and air sealing, and choosing an available rate option that fits your usage pattern.