| Country | Terrain |
| Namibia | mostly high plateau; Namib Desert along coast; Kalahari Desert in east |
| Nauru | sandy beach rises to fertile ring around raised coral reefs with phosphate plateau in center |
| Navassa Island | raised coral and limestone plateau, flat to undulating; ringed by vertical white cliffs (9 to 15 m high) |
| Nepal | Tarai or flat river plain of the Ganges in south, central hill region, rugged Himalayas in north |
| Netherlands | mostly coastal lowland and reclaimed land (polders); some hills in southeast |
| New Caledonia | coastal plains with interior mountains |
| New Zealand | predominately mountainous with some large coastal plains |
| Nicaragua | extensive Atlantic coastal plains rising to central interior mountains; narrow Pacific coastal plain interrupted by volcanoes |
| Niger | predominately desert plains and sand dunes; flat to rolling plains in south; hills in north |
| Nigeria | southern lowlands merge into central hills and plateaus; mountains in southeast, plains in north |
| Niue | steep limestone cliffs along coast, central plateau |
| Norfolk Island | volcanic formation with mostly rolling plains |
| Northern Mariana Islands | southern islands are limestone with level terraces and fringing coral reefs; northern islands are volcanic |
| Norway | glaciated; mostly high plateaus and rugged mountains broken by fertile valleys; small, scattered plains; coastline deeply indented by fjords; arctic tundra in north |
| Oman | central desert plain, rugged mountains in north and south |
| Pacific Ocean | surface currents in the northern Pacific are dominated by a clockwise, warm-water gyre (broad circular system of currents) and in the southern Pacific by a counterclockwise, cool-water gyre; in the northern Pacific, sea ice forms in the Bering Sea and Sea of Okhotsk in winter; in the southern Pacific, sea ice from Antarctica reaches its northernmost extent in October; the ocean floor in the eastern Pacific is dominated by the East Pacific Rise, while the western Pacific is dissected by deep trenches, including the Mariana Trench, which is the world's deepest |
| Pakistan | flat Indus plain in east; mountains in north and northwest; Balochistan plateau in west |