ZIP code 83251 covers Mackay, Idaho in Custer County. This area is served by 9 utility providers across 4 categories. The average residential electricity rate here is 10.6¢/kWh. 59.8% of households use electricity as their primary heating fuel.
Estimated monthly utility costs
$531/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 83251?
Contact each provider separately before your move-in date. Start with electric (Salmon River Electric Coop Inc) 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 83251?
Total estimated monthly costs are around $530, which is about $147 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 $43. Costs vary by home size, usage, and season. Estimates from U.S. Census ACS data.
Is electricity expensive in 83251?
No — electricity in Mackay, ID costs about 30% less than the national average. Based on 2023 NREL residential electricity rate data.
What internet providers are available in 83251?
Mackay, ID has broadband coverage. Providers include ATC Communications (Fiber / DSL up to 1,000 Mbps), CusterTel (Cable / Fiber up to 1,000 Mbps), T-Mobile (Fixed Wireless up to 100 Mbps). Availability varies by street address. Based on FCC Broadband Data Collection filings.
What county is 83251 in?
ZIP code 83251 is in Custer County, Idaho.
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.