| Country | Terrain |
| Jersey | gently rolling plain with low, rugged hills along north coast |
| Jordan | mostly desert plateau in east, highland area in west; Great Rift Valley separates East and West Banks of the Jordan River |
| Kazakhstan | vast flat steppe extending from the Volga in the west to the Altai Mountains in the east and from the plains of western Siberia in the north to oases and deserts of Central Asia in the south |
| Kenya | low plains rise to central highlands bisected by Great Rift Valley; fertile plateau in west |
| Kiribati | mostly low-lying coral atolls surrounded by extensive reefs |
| Korea, North | mostly hills and mountains separated by deep, narrow valleys; coastal plains wide in west, discontinuous in east |
| Korea, South | mostly hills and mountains; wide coastal plains in west and south |
| Kosovo | flat fluvial basin with an elevation of 400-700 m above sea level surrounded by several high mountain ranges with elevations of 2,000 to 2,500 m |
| Kuwait | flat to slightly undulating desert plain |
| Kyrgyzstan | peaks of Tien Shan and associated valleys and basins encompass entire nation |
| Laos | mostly rugged mountains; some plains and plateaus |
| Latvia | low plain |
| Lebanon | narrow coastal plain; El Beqaa (Bekaa Valley) separates Lebanon and Anti-Lebanon Mountains |
| Lesotho | mostly highland with plateaus, hills, and mountains |
| Liberia | mostly flat to rolling coastal plains rising to rolling plateau and low mountains in northeast |
| Libya | mostly barren, flat to undulating plains, plateaus, depressions |
| Liechtenstein | mostly mountainous (Alps) with Rhine Valley in western third |
| Lithuania | lowland, many scattered small lakes, fertile soil |
| Luxembourg | mostly gently rolling uplands with broad, shallow valleys; uplands to slightly mountainous in the north; steep slope down to Moselle flood plain in the southeast |
| Macau | generally flat |