| Country | Terrain |
| Honduras | mostly mountains in interior, narrow coastal plains |
| Hong Kong | hilly to mountainous with steep slopes; lowlands in north |
| Hungary | mostly flat to rolling plains; hills and low mountains on the Slovakian border |
| Iceland | mostly plateau interspersed with mountain peaks, icefields; coast deeply indented by bays and fiords |
| India | upland plain (Deccan Plateau) in south, flat to rolling plain along the Ganges, deserts in west, Himalayas in north |
| Indian Ocean | surface dominated by counterclockwise gyre (broad, circular system of currents) in the southern Indian Ocean; unique reversal of surface currents in the northern Indian Ocean; low atmospheric pressure over southwest Asia from hot, rising, summer air results in the southwest monsoon and southwest-to-northeast winds and currents, while high pressure over northern Asia from cold, falling, winter air results in the northeast monsoon and northeast-to-southwest winds and currents; ocean floor is dominated by the Mid-Indian Ocean Ridge and subdivided by the Southeast Indian Ocean Ridge, Southwest Indian Ocean Ridge, and Ninetyeast Ridge |
| Indonesia | mostly coastal lowlands; larger islands have interior mountains |
| Iran | rugged, mountainous rim; high, central basin with deserts, mountains; small, discontinuous plains along both coasts |
| Iraq | mostly broad plains; reedy marshes along Iranian border in south with large flooded areas; mountains along borders with Iran and Turkey |
| Ireland | mostly level to rolling interior plain surrounded by rugged hills and low mountains; sea cliffs on west coast |
| Isle of Man | hills in north and south bisected by central valley |
| Israel | Negev desert in the south; low coastal plain; central mountains; Jordan Rift Valley |
| Italy | mostly rugged and mountainous; some plains, coastal lowlands |
| Jamaica | mostly mountains, with narrow, discontinuous coastal plain |
| Jan Mayen | volcanic island, partly covered by glaciers |
| Japan | mostly rugged and mountainous |