word | | Country name |
| Konungariket | Sweden | conventional long form: Kingdom of Sweden conventional short form: Sweden local long form: Konungariket Sverige local short form: Sverige |
| Korea | Korea, North | conventional long form: Democratic People's Republic of Korea conventional short form: North Korea local long form: Choson-minjujuui-inmin-konghwaguk local short form: Choson abbreviation: DPRK |
| Korea | Korea, South | conventional long form: Republic of Korea conventional short form: South Korea local long form: Taehan-min'guk local short form: Han'guk abbreviation: ROK |
| Korsou | 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 |
| Kosova | Kosovo | conventional long form: Republic of Kosovo conventional short form: Kosovo local long form: Republika e Kosoves (Republika Kosovo) local short form: Kosova (Kosovo) |
| Kosoves | Kosovo | conventional long form: Republic of Kosovo conventional short form: Kosovo local long form: Republika e Kosoves (Republika Kosovo) local short form: Kosova (Kosovo) |
| Kosovo | Kosovo | conventional long form: Republic of Kosovo conventional short form: Kosovo local long form: Republika e Kosoves (Republika Kosovo) local short form: Kosova (Kosovo) |
| Kutiyarachu | Sri Lanka | ... Socialist Republic of Sri Lanka conventional short form: Sri Lanka local long form: Shri Lamka Prajatantrika Samajaya di Janarajaya/Ilankai Jananayaka Choshalichak Kutiyarachu local short form: Shri Lamka/Ilankai former: Serendib, Ceylon |
| Kuwait | Kuwait | conventional long form: State of Kuwait conventional short form: Kuwait local long form: Dawlat al Kuwayt local short form: Al Kuwayt |
| Kuwayt | Kuwait | conventional long form: State of Kuwait conventional short form: Kuwait local long form: Dawlat al Kuwayt local short form: Al Kuwayt |
| Kuzey | Cyprus | ... Kibris note: the Turkish Cypriot community, which administers the northern part of the island, refers to itself as the "Turkish Republic of Northern Cyprus" or "TRNC" (Kuzey Kibris Turk Cumhuriyeti or KKTC |