Where is NiSource headquartered?
NiSource is headquartered in Merrillville, IN. The main corporate address used here is 801 East 86th Avenue, Merrillville, IN 46410, while major buyers also sit near utility, regional, operating, field, customer, landfill, water, gas, or project locations.
- HQ
- Merrillville, IN
- HQ address
- 801 East 86th Avenue, Merrillville, IN 46410
- Offices
- Merrillville, IN - headquarters; Columbus, OH - Columbia Gas of Ohio; Chester, VA - Columbia Gas of Virginia; Canonsburg, PA - Columbia Gas of Pennsylvania/Maryland
- Founded
- 1912
- Employees
- Approximately 7,000+
- Largest hub
- Merrillville, IN
NiSource office locations
NiSource's public footprint includes its headquarters and major business, utility, operating, or regional hubs.
- Merrillville, IN - headquarters· Headquarters
- Columbus, OH - Columbia Gas of Ohio· Office
- Chester, VA - Columbia Gas of Virginia· Office
- Canonsburg, PA - Columbia Gas of Pennsylvania/Maryland· Office
- Gary, IN - NIPSCO operating territory· Office
Sources:NiSource investor relationsNiSource quarterly materials
Where is NiSource's headquarters?
NiSource's headquarters is in Merrillville, IN; the public headquarters address used for this profile is 801 East 86th Avenue, Merrillville, IN 46410. Headquarters is the best starting point for executive, finance, legal, investor, strategy, procurement, and corporate technology stakeholders.
What other offices does NiSource have?
Public operating and company signals point to Columbus, OH - Columbia Gas of Ohio; Chester, VA - Columbia Gas of Virginia; Canonsburg, PA - Columbia Gas of Pennsylvania/Maryland; Gary, IN - NIPSCO operating territory. For asset-intensive companies, public location lists often mix offices, operations centers, service districts, plants, landfills, customer centers, and project sites, so sellers should separate corporate buyers from site-level buyers.
What NiSource's office footprint means for territory planning
Use Merrillville, IN for executive and corporate account planning, but map field activity to the operating hubs where the use case lives. For reliability, safety, customer operations, fleet, grid, water, gas, field service, or engineering deals, regional asset leadership can be the real path to budget.
As of June 2026.Sources:NiSource investor relationsNiSource quarterly materials
NiSource — frequently asked questions
