North Sikkim is a district of the Indian state of Sikkim. Its district headquarters is Mangan. It is the seventh least populous district in the country. Mangan is the largest of the six districts of Sikkim. The landscape is mountainous with dense vegetation all the way up to the alpine altitude before thinning out to desert scrub towards the northern tundra. Num…North Sikkim is a district of the Indian state of Sikkim. Its district headquarters is Mangan. It is the seventh least populous district in the country. Mangan is the largest of the six districts of Sikkim. The landscape is mountainous with dense vegetation all the way up to the alpine altitude before thinning out to desert scrub towards the northern tundra. Numerous waterfalls astride the main road make the trip to this district extremely picturesque.