Begusarai is a major city and a municipal corporation in Begusarai district in the state of Bihar, India.Begusarai had traditionally been a communist stronghold and was once referred to as the Leningrad of Bihar.

The name of the district apparently comes from “Begum” (queen) and “Sarai” (inn). The Begum of Bhagalpur used to visit “Simaria Ghat” (holy place on the banks of the Gangas) for a month of pilgrimage, which later took to the slang of Begusarai.

Begusarai is located at 25.42°N 86.13°E.It has an average elevation of 41 metres (134 feet). It has an area of 1879 square.

As per 2011 census Begusarai Municipal Corporation had a total population of 251,136, out of which 133,931 were males and 117,205 were females with sex ratio at 875. The population younger than 5 years of age a was 37,966. The literacy rate of the 7+ population was 79.35%.