It is a small town on the Indo-Nepal border near the historic Kosi Barrage on the Kosi River. It has an airport too, which is being modernised and later on will be utilized for commercial as well defence use. It had been made when first prime minister of India Pandit Jawahar Lal Nehru had landed here to lay the foundation stone of Koshi Barrage. The city mostly consists of colonies made for employ
ees and officers of Koshi project. Its Koshi High School was once most sought after school in entire Koshi region. There is also a Koshi Club here, adjacent to the school campus. It is a centre for sports and cultural activities. There is also a government college named Lalit Naryan Mishra Smarak Mahavidyalay on the name of Lalit Narayan Mishra, who was railway minister of India from 1973 to 1975 and who died in 1975 in a bomb blast at Samastipur. His birthplace, Balwa, is 13 kilometer towards the south from Birpur. Neighbouring areas are Basantpur, Bhimnagar, Kataiya Power House, which is a hydro power plant, Hriday Nagar, Bhavani Pur. Nearest railway head from Birpur is Raghopur in the south and Forbesganj and Jogbani in the east. There is direct train from Jogbani to Kolkata and Delhi.
