About Us

About Us

Columbia Gas of Ohio


Columbia Gas of Ohio, headquartered in Columbus, is one of the seven energy- distribution companies of NiSource Inc. (NYSE: NI). Serving approximately 1.4 million residential, commercial and industrial customers, Columbia Gas of Ohio is the largest natural gas utility in the state. 

Innovation Leader

The company is an industry leader in the development of innovative services and programs such as CustomerCHOICE®. The Customer CHOICE® program provides residential and small commercial customers the opportunity to reduce their energy costs by purchasing their natural gas from non-utility suppliers. Columbia Gas of Ohio has a proven track record of service reliability and customer safety.  The company actively supports non-profit agencies and organizations in the communities it serves. 

Columbia Gas of Ohio Statistics 

Years in Business 

Since early 1900s (including predecessor companies)

Communities Served  

1,032, including Columbus, Toledo, Parma, Mansfield & Springfield

Service Territory;

61 of 88 counties served, 25,400 square miles

Miles of distribution main


Total Plant Investment

$1.6 billion

State and Local Taxes

$116 million annually



Residential Customers


Commercial Customers


Industrial Customers


Total Customers