Arun Rural Municipality is one of the 9 municipalities in Bhojpur District of Koshi Province. As per the 2021 census, the rural municipality has a total population of 14,591, comprising 7,135 males (48.9%) and 7,456 females (51.1%), with a literacy rate of 76.45%. Spanning 154.76 square kilometers, Arun Rural Municipality exhibits the population density of 94 people per square kilometer. Administratively, it is divided into 7 wards.
According to the latest publicly available report of the Center for Education and Human Resource Development (CEHRD), Arun has 37 schools. Of these, 2 are private and 35 are public. The breakdown includes 33 pre-schools, 37 basic schools, and 7 secondary schools. Among the secondary schools, 5 offer +2 programs.
Some of the popular schools within the region include Kataka Secondary School, Sharda Secondary School Pyauli Bhojpur, Champe Secondary School, Mahendrodaya Secondary School, and Arunodaya Secondary School Bhojpur.