Chainpur Muncipality is one of the newly declared Municipality located in Sankhuwasabha District of Eastern Development Region. It is about  139 Km North to Dharan.  It has been created merging 5 VDC’s namely Chainpur, Siddhkali, Siddhapokhari, Baneshwar and Kharang. It is surrounded by HewaKhola at North, PiluwaKhola at South, Taplejung District at east and Bhojpur District at West. The municipality stands at the elevation of approximately about 1200 m above sea level.

Religious and cultural festivities form a major part of the lives of people residing in Chainpur Municipality. There are people of various religious beliefs, Hinduisim, Buddhism, and Christianity as well, giving Chainpur a cosmopolitan culture. Nepali is the most commonly spoken language in the municipality. Chainpur is an ancient market place of the eastern region of Nepal. Chainpur has been famous for hundreds of years for “Karuwa”, a special kind of water mug with pipe tap sculptured with artistic carving on exterior of it. It used to be district headquarters of Sankhuwasabha before it was shifted to Khandbari. Proposed Municipality Office loacated on Chainpur as a market place is dominated by Newar where as other area has domination of Tamang and Magar Village. So the  Languages such as Tamang and Gurung are major spoken within the peripheral area. The population of the area is 24735 as per Population Census 2011, spread over 171.8 sq. km. and population density is 144 persons per sq. km.