High Quality Content by WIKIPEDIA articles! Pa n is the capital of the Indian state of Bihar. The modern city of Patna is situated on the southern bank of the Ganges. The city also straddles the rivers Kosi, Sone and Gandak. Patna is approximately 25 km long and 9 km to 10 km wide. Patna is 14th most populous cities in India with approximately 1.8 million and 168th most populous agglomerations in world . It's the largest city in Eastern India after Kolkata. Today, all major companies have a base in Patna reflecting the growing importance of the city. The city is growing rapidly with bouyant development in sectors including retail and property. It is also fast emerging as hub of higher education with institutes of national repute being started in Patna.