| Country | Area - comparative |
| Norway | slightly larger than New Mexico |
| Oman | slightly smaller than Kansas |
| Pacific Ocean | about 15 times the size of the US; covers about 28% of the global surface; larger than the total land area of the world |
| Pakistan | slightly less than twice the size of California |
| Palau | slightly more than 2.5 times the size of Washington, DC |
| Panama | slightly smaller than South Carolina |
| Papua New Guinea | slightly larger than California |
| Paracel Islands | NA |
| Paraguay | slightly smaller than California |
| Peru | slightly smaller than Alaska |
| Philippines | slightly larger than Arizona |
| Pitcairn Islands | about 0.3 times the size of Washington, DC |
| Poland | slightly smaller than New Mexico |
| Portugal | slightly smaller than Indiana |
| Puerto Rico | slightly less than three times the size of Rhode Island |
| Qatar | slightly smaller than Connecticut |
| Romania | slightly smaller than Oregon |
| Russia | approximately 1.8 times the size of the US |
| Rwanda | slightly smaller than Maryland |
| Saint Barthelemy | less than an eighth of the size of Washington, DC |
| Saint Helena | slightly more than twice the size of Washington, DC |
| Saint Kitts and Nevis | 1.5 times the size of Washington, DC |
| Saint Lucia | 3.5 times the size of Washington, DC |
| Saint Martin | more than one-third the size of Washington, DC |
| Saint Pierre and Miquelon | 1.5 times the size of Washington, DC |
| Saint Vincent and the Grenadines | twice the size of Washington, DC |
| Samoa | slightly smaller than Rhode Island |
| San Marino | about 0.3 times the size of Washington, DC |
| Sao Tome and Principe | more than five times the size of Washington, DC |
| Saudi Arabia | slightly more than one-fifth the size of the US |
| Senegal | slightly smaller than South Dakota |
| Serbia | slightly smaller than South Carolina |
| Seychelles | 2.5 times the size of Washington, DC |
| Sierra Leone | slightly smaller than South Carolina |
| Singapore | slightly more than 3.5 times the size of Washington, DC |
| Slovakia | about twice the size of New Hampshire |
| Slovenia | slightly smaller than New Jersey |
| Solomon Islands | slightly smaller than Maryland |
| Somalia | slightly smaller than Texas |
| South Africa | slightly less than twice the size of Texas |
| South Georgia and the South Sandwich Islands | slightly larger than Rhode Island |
| Southern Ocean | slightly more than twice the size of the US |
| Spain | slightly more than twice the size of Oregon |
| Spratly Islands | NA |
| Sri Lanka | slightly larger than West Virginia |