Where is NiSource Headquarters?
Main Office Address and Global Locations

The official headquarters of NiSource Inc is located at 801 E 86th Ave, Merrillville, Indiana, United States. This facility is situated within a commercial district in Merrillville, serving as the primary base for the company's administrative and executive functions. The building is designed to accommodate large-scale corporate operations, providing the necessary infrastructure for managing complex utility networks across multiple states. Its location in Indiana allows for efficient oversight of the company's regional gas and electric distribution segments. The site maintains standard office facilities to support the daily requirements of its corporate staff and management teams. As the operational heart of the organization, this headquarters plays a critical role in the strategic direction of the company's energy services. It houses key departments responsible for regulatory compliance, financial planning, and the oversight of transmission and distribution systems. By centralizing these functions, the facility enables the company to maintain consistent service standards for its residential, commercial, and industrial customers. This command center is essential for coordinating the wholesale and transmission transaction services that define the company's market presence. The site functions as the primary point of contact for corporate governance and long-term infrastructure development initiatives.