Stongdey Monastery, often written Stongde, Stongday, Tonday or Thonde, is a flourishing Buddhist monastery in Zanskar, Ladakh, northern India, approximately 18 km (11 mi) northeast of Padum, on the road to Nimmu.

[2] The gompa was founded in 1052 by Naropa's disciple, the famous translator Lama Marpa Lotsawa (1012-1097).

[1][3] It is the second largest monastic institution in Zanskar, with a community of about 60 Gelukpa monks.

[1] Every year the Gustor Festival is held on the 28th and 29th day in the eleventh month of the Tibetan calendar.

The Tshogs-khang is decorated with exquisite painting including some with deities on a black background outlined in gold.