Electricity rates in 20658 — Marbury, MD
Homes in ZIP 20658 pay about 18.6¢ per kWh (Southern Maryland Elec Coop Inc., Jan–Aug 2026). The Maryland average is 21.4¢ and the U.S. average 18.2¢ (Aug 2026).
What a month of electricity costs
Monthly cost at the average price of 18.6¢ per kWh. Real bills add or subtract fixed charges, tiers, time-of-use and fuel adjustments.
Where ZIP 20658 is
Outlined: ZIP code area · scroll or pinch to zoomUtilities serving 20658
| Utility | Home price | Avg. bill | Customers in MD |
|---|---|---|---|
| Southern Maryland Elec Coop Inc. Cooperative | 18.6¢ Jan–Aug 2026 | $170 | 160,882 |
Utilities are matched to this ZIP code by NREL’s ZIP–utility table and the EIA service-territory list for Charles County; county matches may serve only part of the area. Prices are each utility’s average residential revenue per kWh.
Maryland price trend
Hover or tap the chart for exact monthly values. Source: EIA-861M (monthly, latest months preliminary); forecast: EIA Short-Term Energy Outlook (October 2026) for the South Atlantic region, which includes Delaware, District of Columbia, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, West Virginia.
Averages, not a quote. Prices here are what each utility’s residential customers paid on average (revenue ÷ kWh sold, fixed charges included), as reported to the U.S. Energy Information Administration. Your own rate depends on your plan, season and usage — check your bill or your utility’s tariff.
Questions about 20658
How much does electricity cost in 20658?
About 18.6¢ per kWh for homes (Southern Maryland Elec Coop Inc., Jan–Aug 2026, EIA). At 900 kWh a month that is roughly $168.
Who is the electric utility for 20658?
Southern Maryland Elec Coop Inc., with about 160,882 residential customers in Maryland.
Is electricity in MD getting more expensive?
The Maryland residential average was 21.4¢ per kWh in August 2026, up 7.6% from a year earlier; the U.S. average was 18.2¢.
Can I choose my electricity supplier in MD?
Maryland allows retail electricity choice for many households; the local utility still delivers the power.