Kalyanpur Municipality is one of the 17 municipalities in Siraha District of Madhesh Province. As per the 2021 census, the municipality has a total population of 58,872, comprising 28,198 males (47.9%) and 30,674 females (52.1%), with a literacy rate of 60.98%. Spanning 76.81 square kilometers, Kalyanpur Municipality exhibits the population density of 766 people per square kilometer. Administratively, it is divided into 12 wards.
According to the latest publicly available report of the Center for Education and Human Resource Development (CEHRD), Kalyanpur has 56 schools. Of these, 15 are private and 30 are public. The breakdown includes 33 pre-schools, 56 basic schools, and 9 secondary schools. Among the secondary schools, 3 offer +2 programs.
Some of the popular schools within the municipal area include Ram Dulari Secondary School, Lakshan Mandal Janta Secondary School, Secondary School Bishnupur Dadaul, Bishnu Charan Shrestha Secondary School Belaha, and Gopal Saryug Nayak Janata Secondary School Bhediya.