ZIP code 20878 covers Gaithersburg, Maryland in Montgomery County. This area is served by 17 utility providers across 5 categories. The average residential electricity rate here is 13.3¢/kWh. 50% of households use natural gas as their primary heating fuel.
Estimated monthly utility costs
$343/month
Cost estimates from U.S. Census ACS 5-year data · Shorter bar = lower cost
Electric
Natural Gas
Water
Sewer
Internet
Business Internet
These providers offer business-class internet service in this area.
Nearby ZIP codes
Frequently asked questions
How do I set up utilities when moving to 20878?
Contact each provider separately before your move-in date. Start with electric (Baltimore Gas & Electric Co) and gas (Washington Gas, (800) 752-7520) since those typically need a few business days to activate. Water and sewer are often handled with one call to your local utility. Set up internet last since it may require an installation visit.
How much do utilities cost per month in 20878?
Total estimated monthly costs are around $342, which is about $41 less than the national average. Electricity is the biggest expense at roughly $175/month. Natural gas runs about $125. Water and sewer combined are around $43. Costs vary by home size, usage, and season. Estimates from U.S. Census ACS data.
Is electricity expensive in 20878?
No — electricity in Gaithersburg, MD costs about 11% less than the national average. Compared to Maryland overall, rates here are about 14% higher. Based on 2023 NREL residential electricity rate data.
What internet providers are available in 20878?
Gaithersburg, MD has strong broadband coverage. Providers include AT&T (Fixed Wireless up to 100 Mbps), Astound Broadband (Cable up to 1,500 Mbps), Atlantech Online Inc (Fiber up to 200 Mbps), T-Mobile (Fixed Wireless up to 100 Mbps), TPx Communications (DSL up to 300 Mbps). Availability varies by street address. Based on FCC Broadband Data Collection filings.
What county is 20878 in?
ZIP code 20878 is in Montgomery County, Maryland.
Disclaimer: Provider information is sourced from federal databases including HIFLD, EPA SDWIS, FCC Broadband Data, and EIA-861. Utility cost estimates are from the U.S. Census Bureau American Community Survey 5-Year Estimates. Electric rates are based on 2023 NREL data. Coverage areas are approximate and may not reflect recent changes. Please verify directly with your provider.
Data sources: U.S. Census Bureau, NREL, EIA-861, HIFLD, EPA, FCC. Last updated: April 2026.