ZIP code 57720 covers Buffalo, South Dakota in Harding County. This area is served by 7 utility providers across 4 categories. 2.9% of households use bottled/lp gas as their primary heating fuel.
Estimated monthly utility costs
$460/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 57720?
Contact each provider separately before your move-in date. Start with electric (Montana-Dakota Utilities Co) 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 57720?
Total estimated monthly costs are around $459, which is about $76 more than the national average. Electricity is the biggest expense at roughly $175/month. Natural gas runs about $225. Water and sewer combined are around $60. Costs vary by home size, usage, and season. Estimates from U.S. Census ACS data.
What internet providers are available in 57720?
Buffalo, SD has strong broadband coverage. Providers include AT&T (Fixed Wireless up to 30 Mbps), Consolidated Telcom (Fiber up to 1,000 Mbps), Verizon (Fixed Wireless up to 50 Mbps), West River Cooperative Telephone Company (Fiber up to 250 Mbps). Availability varies by street address. Based on FCC Broadband Data Collection filings.
What county is 57720 in?
ZIP code 57720 is in Harding County, South Dakota.
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.