ZIP code 51535 covers Griswold, Iowa in Cass County. This area is served by 19 utility providers across 5 categories. The average residential electricity rate here is 14.4¢/kWh. 41.8% of households use natural 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
Natural Gas
Water
Sewer
Internet
Nearby ZIP codes
Frequently asked questions
How do I set up utilities when moving to 51535?
Contact each provider separately before your move-in date. Start with electric (Interstate Power and Light Co) and gas (Midamerican Energy, (888) 427-5632) 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 51535?
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.
Is electricity expensive in 51535?
Electricity costs in Griswold, IA are close to the national average. Based on 2023 NREL residential electricity rate data.
What internet providers are available in 51535?
Griswold, IA has strong broadband coverage. Providers include Cumberland Telephone Company (Fiber up to 100 Mbps), Frontier (DSL up to 10 Mbps), Griswold Communications Blue Surge Internet (Fiber up to 1,000 Mbps), Marne & Elk Horn Telephone Company (Fiber up to 1,000 Mbps), T-Mobile (Fixed Wireless up to 25 Mbps). Availability varies by street address. Based on FCC Broadband Data Collection filings.
What county is 51535 in?
ZIP code 51535 is in Cass County, Iowa.
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.