Erdenedalai (Mongolian: Эрдэнэдалай, Jewel ocean) is a sum (district) and town of Dundgovi Province in central Mongolia.

Gimpil Darjaalan Khiid is a sightworthy monastery in the town of Erdenedalai, the administration center of the sum.

The monastery was built at the end of the 18th century, and about 500 monks lived there.

There are several shops, a health clinic, kindergarten and a hotel in Erdenedalai.

Two parks with a memorial were laid out opposite the administration building of the sum although it is very difficult to take care of trees and bushes in the dry climate.