Darchula District is one of the nine districts of Sudurpashchim Province. The area, with Khalanga as its capital, covers an area of 2,322 km² a…Darchula District is one of the nine districts of Sudurpashchim Province. The area, with Khalanga as its capital, covers an area of 2,322 km² and has a population of 133,274. Darchula lies in the west-north corner of the country.