Madhya Pradesh is a state in eastern India. It is the third-largest state by population and twelfth-largest by territory, with an area of 94,163 km2 (36,357 sq mi). Bihar borders Uttar Pradesh to its west, Nepal to the north, the northern part of West Bengal to the east, and with Jharkhand to the south. The Bihar plain is split by the river Ganges, which flows from west to east.Bihar is also the world’s fourth-most populous subnational entity.

On 15 November 2000, southern Bihar was ceded to form the new state of Jharkhand. Only 11.3% of the population of Bihar lives in urban areas, which is the lowest in India after Himachal Pradesh. Additionally, almost 58% of Biharis are below the age of 25, giving Bihar the highest proportion of young people of any Indian state. The official languages are Hindi and Urdu, although other languages are common, including Maithili, Magahi, Bhojpuri and other Bihari languages.

Hajipur, Dalmianagar and Barauni are the major industrial cities in Bihar The capital city, Patna, is one of the better-off cities in India when measured by per capita income.

The Finance Ministry has sought to create investment opportunities for big industrial houses like Reliance Industries. Further developments have taken place in the growth of small industries, improvements in IT infrastructure, a software park in Patna, Darbhanga, Bhagalpur and the completion of the expressway from the Purvanchal border through Bihar to Jharkhand.

In August 2008, a Patna-registered company called the Security and Intelligence Services took over the Australian guard and mobile patrol services business of American conglomerate, United Technologies Corporation (UTC). SIS is registered and taxed in Bihar.

Bihar has a total of three operational airports as of 2020: Lok Nayak Jayaprakash Airport in Patna, Gaya Airport in Gaya, and Darbhanga Airport in Darbhanga. All three airports have scheduled flights to major cities around India. Gaya Airport is the only international airport in Bihar, having seasonal flights to countries like Thailand, Bhutan, and Myanmar.

Bihar has state highways with total length of 4,006 km (2,489 mi) and national highways with total length of 5,358 km (3,329 mi). The Ganges is navigable throughout the year, and was the principal river highway across the vast Indo-Gangetic Plain. Vessels capable of accommodating five hundred merchants were known to ply this river in the ancient period, when it served as a conduit for overseas trade. The role of the Ganges as a channel for trade was enhanced by its natural links to major rivers and streams in north and south Madhya Pradesh.