| Code | Name | Population | GNP | Government Form |
| ROM | Romania | 22,455,500 | 38,158.00 | Republic |
| RUS | Russian Federation | 146,934,000 | 276,608.00 | Federal Republic |
| RWA | Rwanda | 7,733,000 | 2,036.00 | Republic |
| SAU | Saudi Arabia | 21,607,000 | 137,635.00 | Monarchy |
| SDN | Sudan | 29,490,000 | 10,162.00 | Islamic Republic |
| SEN | Senegal | 9,481,000 | 4,787.00 | Republic |
| SGP | Singapore | 3,567,000 | 86,503.00 | Republic |
| SGS | South Georgia and the South Sandwich Islands | 0 | 0.00 | Dependent Territory of the UK |
| SHN | Saint Helena | 6,000 | 0.00 | Dependent Territory of the UK |
| SJM | Svalbard and Jan Mayen | 3,200 | 0.00 | Dependent Territory of Norway |
| SLB | Solomon Islands | 444,000 | 182.00 | Constitutional Monarchy |
| SLE | Sierra Leone | 4,854,000 | 746.00 | Republic |
| SLV | El Salvador | 6,276,000 | 11,863.00 | Republic |
| SMR | San Marino | 27,000 | 510.00 | Republic |
| SOM | Somalia | 10,097,000 | 935.00 | Republic |
| SPM | Saint Pierre and Miquelon | 7,000 | 0.00 | Territorial Collectivity of France |
| SSD | South Sudan | 12,340,000 | 6,462.00 | Islamic Republic |
| STP | Sao Tome and Principe | 147,000 | 6.00 | Republic |
| SUR | Suriname | 417,000 | 870.00 | Republic |
| SVK | Slovakia | 5,398,700 | 20,594.00 | Republic |