Korba is defined by its massive industrial enterprises, which are among the largest in the country.
* **SECL (South Eastern Coalfields Limited)**: A Miniratna company and one of the largest coal-producing subsidiaries of Coal India. It operates mega open-cast mines in Korba, including Gevra (one of the largest in Asia), Dipka, and Kusmunda. * **NTPC (National Thermal Power Corporation)**: Operates the massive Korba Super Thermal Power Plant, a cornerstone of India's power grid. * **BALCO (Bharat Aluminum Company)**: A major aluminum producer, originally a public sector enterprise, now part of Vedanta Resources, operating a massive smelter and captive power plant here. * **CSPGCL (Chhattisgarh State Power Generation Company Limited)**: Operates several thermal power units in the district, including the Hasdeo Thermal Power Station.