Delaware's biggest city runs differently from its smaller ones: Wilmington is served by Delmarva Power and Light in a deregulated market where you can shop for your own supplier, while Dover, Middletown and Smyrna each run their own small-town municipal electric utility with no plan to shop for. Newark sits in split territory. Your address decides which world you're in.
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Where each electric provider led our address-level sampling. Hover a city for its provider; click through for the full guide. Tap a legend entry to trace one provider across the state.
From our address-level sampling of 2 Delaware cities (2026-07-20). "Most common in" counts the cities where that provider was the leading answer.
| Utility | Provider | Most common in |
|---|---|---|
| ⚡ Electricity | Delmarva Power and Light | Wilmington |
| City of Dover | Dover | |
| 💧 Water | Wilmington | Wilmington |
| Dover | Dover |
Delmarva Power delivered electricity at every sampled Wilmington address, and Wilmington sits in a deregulated retail market — you can shop for your own electricity supplier there while Delmarva keeps the wires running either way. Head south and the picture changes completely: Dover, Middletown and Smyrna each run their own small municipal electric utility, with no retail choice involved at all. Newark, home to the University of Delaware, is genuinely split territory in our sample.
So the account structure in Delaware depends heavily on which part of the state you're in — Wilmington's setup resembles the deregulated Mid-Atlantic pattern, while the smaller towns further south run more like traditional city-owned utilities. Wilmington is also the one city in our sample with confident water data, through the city's own water department.
City-by-city breakdowns of who provides electricity, gas, water and sewer:
Delmarva Power delivered electricity at every sampled Wilmington address. Wilmington also sits in Delaware's deregulated retail market, so you're free to shop for your own electricity supplier while Delmarva keeps the wires running regardless.
Only in Wilmington, based on our sample — it's the one city flagged as a deregulated retail market. Dover, Middletown and Smyrna each run their own municipal electric utility with no retail choice involved; there's no supplier to shop for in those towns.
Each of these smaller Delaware towns runs its own city- or town-owned electric utility rather than buying from Delmarva Power — a genuinely different setup from Wilmington's deregulated, investor-owned pattern.
Wilmington's own water department served every sampled address in the city. The other Delaware cities in our sample don't yet have confident water data, so check the lookup for your specific address.
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Find my providersProvider data comes from our address-level utility lookup engine, aggregated from geographically spread sample addresses in each Delaware city. Data refreshed 2026-07-20. Territories vary address by address — always confirm yours with the lookup. Read how we verify provider data.