Korba District is an administrative district of Chhattisgarh state in central India. The headquarter of this district is Korba. It is the Largest District (By Area) in the state. The district is named for the Korwa tribe that inhabits the northern part of Chhattisgarh.

Korba was formerly known as Gourigarh. The district was originally ruled by the Haihaiyas until it was conquered by the Marathas during their expansion into Chhattisgarh. Various parts of the district were controlled by small zamindars belonging to a variety of communities such as Gond and Kanwar. The Korwas managed to overthrow the rulers of Gourigarh and ruled the region until being displaced by the Rajputs under Ratan Singh. These rulers managed to retain their lands during the arrival of Marathas and British. In 1861 Korba became part of the newly formed Bilaspur district.

The district is situated in the Northern part of the state, at the point where the Chhattisgarh plain meets the Surguja plateau. The south of the district is the northern end of the Chhattisgarh plain. In the west, these plains meet an extension of the Maikal Hills that separate the lowlands from the plateau. In the east is located the Deopahadi Range. These heavily forested hills are divided by the valley of the Hasdeo River. The area's most important hill is Karela Hill with a height of 3,253 feet (992 m). To the north of Katghora, the slope of the valleys of the Hasdeo and Gage is very less and joins the Surguja District in the north. The Tan and Chorai Rivers joins the River Hasdeo from opposite directions – from the east and the west. Towards the northern banks are the Gurudwari Hill, Janta Hill, Matin and Dhajag Hills.

Korba is known for its coal mines such as Gevra Area (one of the biggest coal mines of Asia), Kusmunda Area and Dipka Area (SECL parent company - Coal India) all located in Korba Coalfield. It also has power plants such as NTPC, CSEB, and BALCO.

According to the 2011 census, Korba district has a population of 1,206,640, roughly equal to the nation of Bahrain[4] or the US state of New Hampshire out of which 612,915 are male and 593,725 are female. This gives it a ranking of 395th in India (out of a total of 640). The district has a population density of 183 inhabitants per square kilometre (470/sq mi). ts population growth rate over the decade 2001-2011 was 19.25%. Korba has a sex ratio of 971 females for every 1000 males, and a literacy rate of 73.22%. 36.99% of the population lives in urban areas. Scheduled Castes and Scheduled Tribes made up 10.33% and 40.90% of the population respectively. Most of the people can speak and understand hindi there. It is widely spoken by peoples.

At the time of the 2011 Census of India, 82.68% of the population in the district spoke Chhattisgarhi, 11.61% Hindi, 1.00% Kurukh 0.94% Bhojpuri, 0.61% Bengali and 0.41% Odia as their first language.