Gas Utilities Directory — utility profile
Columbia Gas of Ohio
Ohio · Investor-Owned · Major Regulated
Utility overview
- Utility name
- Columbia Gas of Ohio
- Legal name
- Columbia Gas of Ohio, Inc.
- Parent organization
- NiSource Inc.
- Ownership type
- Investor-Owned
- Utility class
- Major Regulated
- Rate jurisdiction
- Public Utilities Commission of Ohio
- State directory
- Ohio utilities
- Customer classes
- Commercial, Residential
Official website and contact
- Official website
- www.columbiagasohio.com
- Customer service phone
- 1-800-344-4077
- Gas emergency
- 1-800-344-4077
- Not published
Contact details are shown only where the utility publishes them.
Published state services
Ohio
~1.5 million customers statewide (Columbia Gas of Ohio service territory).
Customer classes: Commercial, Residential
Last confirmed: August 23, 2026
State customer informationVerification sources
- P.U.C.O. No. 2 — Rules and Regulations Governing the Distribution and Sale of Gas
Columbia Gas of Ohio, Inc. · Tariff — Residential Customer definition; Rate SGS; distribution and sale (accessed 2026-08-23)
- Natural Gas Distribution Companies
Public Utilities Commission of Ohio · State Regulator Inventory — Lists CGO — Columbia Gas of Ohio, Inc. as PUCO-regulated large company (accessed 2026-08-23)
- Natural gas overview
PUCO · State Regulator Inventory — Regulates distribution companies; Columbia Gas of Ohio Customer Choice (accessed 2026-08-23)