ZIP code 21791 covers Union Bridge, Maryland in Frederick County. This area is served by 42 utility providers across 4 categories. The average residential electricity rate here is 9.6¢/kWh. 40.1% of households use electricity as their primary heating fuel.
Estimated monthly utility costs
$548/month
Cost estimates from U.S. Census ACS 5-year data · Shorter bar = lower cost
Electric
Water
Sewer
Internet
Nearby ZIP codes
Frequently asked questions
How do I set up utilities when moving to 21791?
Contact each provider separately before your move-in date. Start with electric (The Potomac Edison Company) 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 21791?
Total estimated monthly costs are around $547, which is about $164 more than the national average. Electricity is the biggest expense at roughly $175/month. Natural gas runs about $313. Water and sewer combined are around $60. Costs vary by home size, usage, and season. Estimates from U.S. Census ACS data.
Is electricity expensive in 21791?
No — electricity in Union Bridge, MD costs about 36% less than the national average. Compared to Maryland overall, rates here are about 18% lower. Based on 2023 NREL residential electricity rate data.
What internet providers are available in 21791?
Union Bridge, MD has strong broadband coverage. Providers include AT&T (Fixed Wireless up to 100 Mbps), Antietam Cable (Fiber up to 5,000 Mbps), EarthLink Business (Fixed Wireless up to 30 Mbps), Glo Fiber (Fiber up to 5,000 Mbps), MN FWA Buyer (Fixed Wireless up to 30 Mbps). Availability varies by street address. Based on FCC Broadband Data Collection filings.
What county is 21791 in?
ZIP code 21791 is in Frederick 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.