| Code | Country | Continent | Population |
| CMR | Cameroon | Africa | 15,085,000 |
| COD | Congo, The Democratic Republic of the | Africa | 51,654,000 |
| COG | Congo | Africa | 2,943,000 |
| COK | Cook Islands | Oceania | 20,000 |
| COL | Colombia | South America | 42,321,000 |
| COM | Comoros | Africa | 578,000 |
| CPV | Cape Verde | Africa | 428,000 |
| CRI | Costa Rica | North America | 4,023,000 |
| CUB | Cuba | North America | 11,201,000 |
| CXR | Christmas Island | Oceania | 2,500 |
| CYM | Cayman Islands | North America | 38,000 |
| CYP | Cyprus | Asia | 754,700 |
| CZE | Czech Republic | Europe | 10,278,100 |
| DEU | Germany | Europe | 82,164,700 |
| DJI | Djibouti | Africa | 638,000 |
| DMA | Dominica | North America | 71,000 |
| DNK | Denmark | Europe | 5,330,000 |
| DOM | Dominican Republic | North America | 8,495,000 |
| DZA | Algeria | Africa | 31,471,000 |
| ECU | Ecuador | South America | 12,646,000 |