Mount Ashley (54°7′S 37°21′W) is a mountain, 1,155 metres (3,790 ft) high, standing south of the Bay of Isles, South Georgia, between the heads of Grace Glacier and Lucas Glacier. Salisbury Plain is nearby.^[1] It is named for Clifford Warren Ashley, an American artist, author, and whaling historian.

The name "Clifford Ashley Mountains" was used by Robert Cushman Murphy for a number of scattered mountains and ridges on the south side of the Bay of Isles, following his visit to South Georgia in 1912–13. The South Georgia Survey, 1955–56, reported that a group name for these features is unsuitable and an altered form of the name was applied to the highest of the mountains, Mount Ashley.