Begusarai is a city and a municipal corporation in Begusarai district in the state of Bihar, India. Begusarai district is one of the thirty-eight districts of Bihar and Begusarai town is the administrative headquarters of this district. The district lies on the northern bank of the Ganges river . It is located at latitudes 25.15N & 25.45N and longitudes 85.45E & 86.36E. Begusarai is the birthplace of famous Hindi poet Rashtrakavi Ramdhari Singh Dinkar and eminent historian Professor Ram Saran Sharma. Begusarai is known for its IOCL Barauni Oil Refinery , Barauni Thermal Power Station and several other Industries as Begusarai is known as Financial Capital of Bihar. Begusarai was formerly part of Munger district or Monghyr (as per British Ruler's official spelling) .