| Code | Name | Continent | Region | Population |
| UGA | Uganda | Africa | Eastern Africa | 21,778,000 |
| UKR | Ukraine | Europe | Eastern Europe | 50,456,000 |
| UMI | United States Minor Outlying Islands | Oceania | Micronesia/Caribbean | 0 |
| URY | Uruguay | South America | South America | 3,337,000 |
| USA | United States | North America | North America | 278,357,000 |
| UZB | Uzbekistan | Asia | Southern and Central Asia | 24,318,000 |
| VAT | Holy See (Vatican City State) | Europe | Southern Europe | 1,000 |
| VCT | Saint Vincent and the Grenadines | North America | Caribbean | 114,000 |
| VEN | Venezuela | South America | South America | 24,170,000 |
| VGB | Virgin Islands, British | North America | Caribbean | 21,000 |
| VIR | Virgin Islands, U.S. | North America | Caribbean | 93,000 |
| VNM | Vietnam | Asia | Southeast Asia | 79,832,000 |
| VUT | Vanuatu | Oceania | Melanesia | 190,000 |
| WLF | Wallis and Futuna | Oceania | Polynesia | 15,000 |
| WSM | Samoa | Oceania | Polynesia | 180,000 |
| YEM | Yemen | Asia | Middle East | 18,112,000 |
| YUG | Yugoslavia | Europe | Southern Europe | 10,640,000 |
| ZAF | South Africa | Africa | Southern Africa | 40,377,000 |
| ZMB | Zambia | Africa | Eastern Africa | 9,169,000 |
| ZWE | Zimbabwe | Africa | Eastern Africa | 11,669,000 |