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 a large workforce, providing the necessary office space for corporate management, legal teams, and regulatory affairs departments. Its architecture reflects a standard corporate office layout, prioritizing functional workspaces and meeting areas to facilitate daily business operations. The site is positioned to maintain proximity to the company's regional utility infrastructure, ensuring that leadership remains connected to the operational demands of the gas and electric segments. As the operational heart of the organization, this Merrillville location plays a critical role in the oversight of NiSource Inc's diverse energy services. It serves as the strategic core where long-term planning for gas distribution and electric generation is developed and implemented. Various departments, including finance, human resources, and corporate communications, are centralized here to ensure consistent policy application across all service areas. By housing key decision-makers in one location, the company maintains efficient communication channels that support its commitment to providing reliable energy to residential, commercial, and industrial customers. This command center is essential for managing the complex regulatory and logistical requirements inherent in the utility industry.