| Country | Area - comparative |
| Grenada | twice the size of Washington, DC |
| Guam | three times the size of Washington, DC |
| Guatemala | slightly smaller than Tennessee |
| Guernsey | about one-half the size of Washington, DC |
| Guinea | slightly smaller than Oregon |
| Guinea-Bissau | slightly less than three times the size of Connecticut |
| Guyana | slightly smaller than Idaho |
| Haiti | slightly smaller than Maryland |
| Heard Island and McDonald Islands | slightly more than two times the size of Washington, DC |
| Holy See (Vatican City) | about 0.7 times the size of The National Mall in Washington, DC |
| Honduras | slightly larger than Tennessee |
| Hong Kong | six times the size of Washington, DC |
| Hungary | slightly smaller than Indiana |
| Iceland | slightly smaller than Kentucky |
| India | slightly more than one-third the size of the US |
| Indian Ocean | about 5.5 times the size of the US |
| Indonesia | slightly less than three times the size of Texas |
| Iran | slightly smaller than Alaska |
| Iraq | slightly more than twice the size of Idaho |
| Ireland | slightly larger than West Virginia |
| Isle of Man | slightly more than three times the size of Washington, DC |
| Israel | slightly larger than New Jersey |
| Italy | slightly larger than Arizona |
| Jamaica | slightly smaller than Connecticut |
| Jan Mayen | slightly more than twice the size of Washington, DC |