Parsa District a part of Madhesh Province in Terai plain, is one of the seventy-seven districts of Nepal. The district, with Birgunj as its district headquarters, covers an area of 1,353 km2 (522 sq mi) and has a population (2001) of 497,219. According to the locals, Parsa is named after the Parashnath temple situated in Mahuwan.
According to locals, the name of the district is derived from the Parsagadhi fort, where the Nepali Gorkhali Soldiers defeated British Soldiers.