Ganden Monastery ( ) 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 4,750m. (The other two 'great monasteries' are Sera Monastery and Drepung Monastery.)

Its full name is dGa' ldan rNam rgyal gling or dGan-ldan rNam-par Gyal-wahi glin = 'Continent of completely victorious happiness').

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 furthest 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.

Ganden Monastery consisted of two principal original colleges, Jangtse and Shartse, meaning North Peak and East Peak respectively. The three main sights in the Ganden Monastery are the Serdung, which contains the tomb of Tsongkhapa, the Tsokchen Assembly Hall and the Ngam Cho Khang the chapel where Tsongkhapa traditionally taught. The monastery houses artifacts which belonged to Tsongkhapa.

It contained more than two dozen major chapels with large Buddha statues. The largest chapel was capable of seating 3,500 monks. Tenzin Gyatso, the present Dalai Lama (born 1935), took his final degree examination in Ganden in 1958 and he feels he has a particularly close connection with Tsongkhapa.

Ganden Monastery was completely destroyed during the rebellion of 1959. In 1966 it was severely shelled by Red Guard artillery and monks then had to dismantle the remains. Most of Tsongkhapa's mummified body was burned but his skull and some ashes were saved from the fire by Bomi Rinpoche, the monk who had been forced to carry the body to the fire. Re-building has been continuing since the 1980s and the "red-painted lhakang in the centre is the reconstruction of Ganden's sanctum sanctorum containing Tsongkapa's reliquary chorten called the Tongwa Donden, 'Meaningful to Behold.'

The Ganden Monastery has been re-established in Karnataka, India by the Tibetan population in exile. The Ganden Monastery is located in the Tibetan settlement at Mundgod. This settlement of Tibetan refugees is the largest of its kind in India and was first established in 1966, from land donated by the Indian government.

In the Tibetan settlement near Mundgod are the Ganden and the Drepung Monastery. In 1999 there were in total about 13,000 residents. The Tibetan settlement consists of nine camps with two monasteries and one nunnery. They have established a credit bank for farms, an agricultural institute and a craft center. Modern technology and communication technology are being introduced. The curriculum of the Ganden Monastery remains similar to the teachings of the pre-1959 Ganden Monastery.

The Ganden Monastery Colleges Jangtse and Shartse have also been reestablished in India. They are named The Ganden Jangtse College and The Gaden Monastery. The are located in Karnataka.