Saptakoshi Municipality (Nepali: सप्तकोशी नगरपालिका) is located in Saptari District in the Province 2 of Nepal. It was formed in 2014 and then again modified in 2016 occupying current 11 sections (wards) from previous 11 wards. It occupies an area of 60.25 km2 (23.26 sq mi) with a total population of 21,139.