Khánh Hòa is a coastal province in the south region of Vietnam. It borders Đắk Lắk to the northwest, Lâm Đồng to the southwest and the South China Sea to the east.

Phú Yên was a former central coastal province in the South Central Coast region of Central Vietnam. It borders Bình Định to the north, Khánh Hòa to the south, Gia Lai to the northwest, Đắk Lắk to the