The mount Yingnyiüshang in the south-eastern part of the district with an approximate height of 2500 meters above sea level is the highest peak.

The Yingnyiü mount is identified as biodiversity hotspot: it hosts species-rich tropical rain forest and supports diverse flora and fauna.

The district's headquarters is at Longleng, which is located at an altitude of about 1,066 m above sea level.

According to the 2011 census Longleng District has a population of 50,484,[2] roughly equal to the nation of Saint Kitts and Nevis.

[2] Longleng has a sex ratio of 903 females for every 1000 males,[2] and a literacy rate of 73.1%.