Utility Providers in O'Fallon, Illinois

O'Fallon is served by 38 utility providers across 4 categories covering 1 ZIP code in St. Clair County.

St. Clair County · Updated May 2026

Utility rates in O'Fallon vs. US average

Electricity
17.0¢/kWh
≈ About US average (16.5¢)
↑ 7% above IL state average (15.9¢)
Natural gas
$11.11/Mcf
↓ 23% below US average
Local electricity rate from NREL Utility Rate Database (2023), averaged across O'Fallon-area providers. State and US electric averages from EIA Form 861 (2024). Natural gas prices from EIA Form 176 (2024, $/Mcf). US avg electricity: 16.5¢/kWh · US avg gas: $14.50/Mcf.

Typical monthly utility bills in O'Fallon

Electricity$200-$249 (17.0¢–17.0¢/kWh)
Natural gas$150-$199
Water & sewer~$43/month

Figures from U.S. Census ACS 5-year estimates, reflecting households that pay utilities separately from rent. In dense urban areas where heat or hot water is often included in rent, these numbers represent the subset of residents who pay directly.

How O'Fallon heats its homes

59%
38%
4%

59% natural gas · 38% electricity · 4% other fuels

Electric rates in O'Fallon

Residential rates range from 17.0¢ to 17.0¢ per kWh.

O'Fallon
17.0¢/kWh
U.S. avg
16.5¢/kWh

This is 3% above the national average of 16.5¢/kWh.

Note: Illinois has a competitive electricity market — you may be able to choose your supplier.

Internet providers in O'Fallon

O'Fallon has strong broadband coverage.

i3 Broadband
8,000 Mbps
Fiber
AT&T
5,000 Mbps
Fiber / DSL / Fixed Wireless
Spectrum
1,000 Mbps
Cable / Fiber
Xfinity
500 Mbps
Fiber
Verizon
300 Mbps
Fixed Wireless

Availability varies by address. Based on FCC Broadband Data Collection filings.

Natural Gas 1 provider

Ameren Illinois

Water 27 providers

AMERICAN WATER OPER AND MAINTENANCE, LLC
ARAPAHO VILLAGE MHP
CAHOKIA HEIGHTS
FSH WATER COMMISSION
IL AMERICAN-EAST ST LOUIS
ILDU LEPERE MHP, LLC
KASKASKIA WATER DISTRICT
MEADOWBROOK MH COMMUNITY, LLC
PRAIRIE DUPONT PWD
S L M WATER COMMISSION
SOUTHWESTERN IL CORRECTIONAL CENTER
VALLEY VIEW ESTATES

Sewer 4 providers

CASEYVILLE TOWNSHIP - WEST STP
CASEYVILLE TOWNSHIP EAST STP
O'FALLON STP, CITY OF

Internet 6 providers

AT&T
Fiber / DSL / Fixed Wireless up to 5,000 Mbps
i3 Broadband
Fiber up to 8,000 Mbps
Spectrum
Cable / Fiber up to 1,000 Mbps
T-Mobile
Fixed Wireless up to 100 Mbps
Verizon
Fixed Wireless up to 300 Mbps
Xfinity
Fiber up to 500 Mbps

ZIP codes in O'Fallon, IL

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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. Local electric rates are based on 2023 NREL Utility Rate Database data; state and US averages are from EIA Form 861 (2024). 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: May 2026.