Electricity rates in 21770 — Monrovia, MD
Homes in ZIP 21770 pay about 17.0¢ per kWh (The Potomac Edison Company, 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 17.0¢ per kWh. Real bills add or subtract fixed charges, tiers, time-of-use and fuel adjustments.
Where ZIP 21770 is
Outlined: ZIP code area · scroll or pinch to zoomUtilities serving 21770
| Utility | Home price | Avg. bill | Customers in MD |
|---|---|---|---|
| The Potomac Edison Company Investor Owned | 17.0¢ Jan–Aug 2026 | $150 | 256,568 |
| Thurmont Municipal Light Co. Municipal · serves Frederick County | 8.7¢ 2024 | $181 | 2,892 |
Utilities are matched to this ZIP code by NREL’s ZIP–utility table and the EIA service-territory list for Frederick 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 21770
How much does electricity cost in 21770?
About 17.0¢ per kWh for homes (The Potomac Edison Company, Jan–Aug 2026, EIA). At 900 kWh a month that is roughly $153.
Who is the electric utility for 21770?
The Potomac Edison Company, with about 256,568 residential customers in Maryland; 1 other utility also serves parts of the area.
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.