Johnston Atoll
lowest point: Pacific Ocean 0 m
highest point: Summit Peak 5 m

Jordan
lowest point: Dead Sea -408 m
highest point: Jabal Ram 1,734 m

Juan de Nova Island
lowest point: Indian Ocean 0 m
highest point: unnamed location 10 m

Kazakhstan
lowest point: Vpadina Kaundy -132 m
highest point: Khan Tangiri Shyngy (Pik Khan-Tengri) 6,995 m

Kenya
lowest point: Indian Ocean 0 m
highest point: Mount Kenya 5,199 m

Kingman Reef
lowest point: Pacific Ocean 0 m
highest point: unnamed location 1 m

Kiribati
lowest point: Pacific Ocean 0 m
highest point: unnamed location on Banaba 81 m

Korea, North
lowest point: Sea of Japan 0 m
highest point: Paektu-san 2,744 m

Korea, South
lowest point: Sea of Japan 0 m
highest point: Halla-san 1,950 m

Kuwait
lowest point: Persian Gulf 0 m
highest point: unnamed location 306 m