Ganden Monastery (also Gaden or Gandain) or Ganden Namgyeling is one of the 'great three' Gelukpa university monasteries of Tibet, located at the top of Wangbur Mountain, Tagtse County, 36 kilometers ENE from the Potala Palace in Lhasa, at an altitude of 4,300m. (The other two 'great monasteries' are Sera Monastery and Drepung Monastery.)

Its full name is Ganden Namgyal Ling (dga' ldan rmam rgyal gling). Ganden means "joyful" and is the Tibetan name for Tuṣita, the heaven where the bodhisattva Maitreya is said to reside. Namgyal Ling means "victorious temple".

It was the original monastery of the Geluk order, founded by Je Tsongkhapa himself in 1409, and traditionally considered to be the seat of Geluk administrative and political power. The Ganden Tripa or 'throne-holder of Ganden' is the head of the Gelukpa school.

Tsongkhapa's preserved body was entombed there in a silver and gold encrusted tomb by his disciples in 1419.

Being the farthest from Lhasa of the three university monasteries, Ganden traditionally had a smaller population with some 6,000 monks in the early 20th century (although Waddell reports an estimate of about 3,300 in the 1890s and there were, apparently only 2,000 in 1959. At this time there are about 170 monks.