Supaul Bazar is an important commercial hub in the Biraul subdivision of Darbhanga, India. It is located approximately 45 kilometres east of Darbhanga.
Supaul Bazar is composed of Afzala, Khewa, Ziraat, Shaikhpura, Biraul, Haat Gaachhi, and Tolwa. The population at the 2001 census was 755,871.
There are two Cinemas by the name of Prasad Chitralya and Pouddar Chitralya. A railway station which connects to Sakri and Darbhanga and a bus station.
There is one high school called Onkar high school, the Rajendra bal vikas vidyalaya convent school and a degree college - J .K. college. Also a distance learning centre for NIOS in Onkar High School.
There are many shops in the commercial district including several Jewellery shops, electronic goods outlets, banks, a post office, clothes shops and eating establishments. here a lot of market is available such as new market, cinema road, middle market.