word | | Country name |
| Cumhuriyeti | Turkey | conventional long form: Republic of Turkey conventional short form: Turkey local long form: Turkiye Cumhuriyeti local short form: Turkiye |
| Cunha | Saint Helena | conventional long form: Saint Helena, Ascension, and Tristan da Cunha conventional short form: none |
| Curacao | Curacao | Dutch long form: Land Curacao Dutch short form: Curacao Papiamentu long form: Pais Korsou Papiamentu short form: Korsou former: Netherlands Antilles; Curacao and Dependencies |
| Curacao | Sint Maarten | Dutch long form: Land Sint Maarten Dutch short form: Sint Maarten English long form: Country of Sint Maarten English short form: Sint Maarten former: Netherlands Antilles; Curacao and Dependencies |
| cutter | Qatar | ... State of Qatar conventional short form: Qatar local long form: Dawlat Qatar local short form: Qatar note: closest approximation of the native pronunciation falls between cutter and gutter, but not like guitar |
| Cypriot | Cyprus | ... Cyprus local long form: Kypriaki Dimokratia/Kibris Cumhuriyeti local short form: Kypros/Kibris note: the Turkish Cypriot community, which administers the northern part of the island, refers to itself as the "Turkish ... |
| Cyprus | Cyprus | conventional long form: Republic of Cyprus conventional short form: Cyprus local long form: Kypriaki Dimokratia/Kibris Cumhuriyeti local short form: Kypros/Kibris note: the Turkish Cypriot community, which administers the northern part ... |
| Czech | Czech Republic | conventional long form: Czech Republic conventional short form: Czech Republic local long form: Ceska Republika local short form: Cesko |
| Dahomey | Benin | conventional long form: Republic of Benin conventional short form: Benin local long form: Republique du Benin local short form: Benin former: Dahomey |
| Danish | Virgin Islands | conventional long form: United States Virgin Islands conventional short form: Virgin Islands former: Danish West Indies abbreviation: USVI |
| Danmark | Denmark | conventional long form: Kingdom of Denmark conventional short form: Denmark local long form: Kongeriget Danmark local short form: Danmark |