word | | Nationality |
| Konger | Hong Kong | noun: Chinese/Hong Konger adjective: Chinese/Hong Kong |
| Korean | Korea, North | noun: Korean(s) adjective: Korean |
| Korean | Korea, South | noun: Korean(s) adjective: Korean |
| Kosovac | Kosovo | noun: Kosovar (Albanian), Kosovac (Serbian) adjective: Kosovar (Albanian), Kosovski (Serbian) note: Kosovan, a neutral term, is sometimes also used as a noun or adjective |
| Kosovan | Kosovo | noun: Kosovar (Albanian), Kosovac (Serbian) adjective: Kosovar (Albanian), Kosovski (Serbian) note: Kosovan, a neutral term, is sometimes also used as a noun or adjective |
| Kosovar | Kosovo | noun: Kosovar (Albanian), Kosovac (Serbian) adjective: Kosovar (Albanian), Kosovski (Serbian) note: Kosovan, a neutral term, is sometimes also used as a noun or adjective |
| Kosovski | Kosovo | noun: Kosovar (Albanian), Kosovac (Serbian) adjective: Kosovar (Albanian), Kosovski (Serbian) note: Kosovan, a neutral term, is sometimes also used as a noun or adjective |
| Kosraen | Micronesia, Federated States of | noun: Micronesian(s) adjective: Micronesian; Chuukese, Kosraen(s), Pohnpeian(s), Yapese |
| Kuwaiti | Kuwait | noun: Kuwaiti(s) adjective: Kuwaiti |
| Kyrgyzstani | Kyrgyzstan | noun: Kyrgyzstani(s) adjective: Kyrgyzstani |
| Lankan | Sri Lanka | noun: Sri Lankan(s) adjective: Sri Lankan |
| Lao | Laos | noun: Lao(s) or Laotian(s) adjective: Lao or Laotian |
| Laotian | Laos | noun: Lao(s) or Laotian(s) adjective: Lao or Laotian |
| Latvian | Latvia | noun: Latvian(s) adjective: Latvian |