Nemjung or Nimjung is a mountain in the Himalayas of Nepal. It is located approximately northwest of the Nepalese capital Kathmandu and about northwest of the eight-thousander, Manaslu. Its summit has an elevation of . This mountain was once called Himlung Himal.
In the 1990s, a few years after the first ascent in 1983, when demarcating the border with China, the Nepalese government changed the traditional name of Himlung Himal to another mountain about 4 kilometres north. The peak between them is properly called Himjung. It is the highest among the three peaks of Nemjung (east), Himjung (centre) and Himlung Himal range (west).
Nemjung was first climbed via the east ridge on October 27, 1983, by a Joint expedition from Nepal and the Hirosaki University Alpine Club led by Junji Kurotaki. A previous attempt had been made in 1963 by a Japanese expedition from the Den Den Kyushu Alpine Club led by Hisachika Zengyou. Later summits were achieved in 1994 by a British expedition, and in 2009 by a French team. On October 30, 2009, a Japanese team led by Osamu Tanabe summited Nemjung via its previously unclimbed west face and west ridge.