Gas Utilities Directory
Illinois — IL
Published gas utilities serving Illinois with verified contacts, service-area evidence, and source links.
GCC provides directory information only. Listings are not legal advice, regulatory advice, endorsements, or guarantees of utility service eligibility.
Verified means GCC confirmed utility identity, retail gas-distribution status, and state-service evidence against authoritative sources.
Service-area summaries are high-level and do not guarantee service at a specific address. Contact the listed utility directly for address-level eligibility.
2 published utilities
Results include published records with verified status, utility and state-service sources, and a confirmation date.
Investor-Owned · Major Regulated
States served: Illinois — IL
Customer classes: Commercial, Residential
Last confirmed: Aug 22, 2026
Service area: Central and southern Illinois; 816,000 natural gas customers (company service-territory page).
Investor-Owned · Major Regulated
States served: Illinois — IL
Customer classes: Commercial, Residential
Last confirmed: Aug 27, 2026
Service area: Natural gas distribution in northern Illinois (Ill.C.C. No. 16 gas service schedule territory).
