Name  | active from | active to | |
| Kryptor | 1987 | | |
| Krystof | 1993 | | |
| Krestan, Robert | 1978 | |  |
| Krivankova, Miroslava | 1974 | 2021 | |
| Kriz, Bora | 1942 | 1987 | |
| Krizek, Honza | 2015 | | |
| Krizek, Ladislav | | | |
| KTO | 1963 | | |
| Kubatko | | | |
| Kubisova, Marta | 1963 | | |
| Kucaj, Martin | 1983 | | |
| Kucera, Petr | 1993 | | |
| KUH Trio | 2018 | | |
| Kuhnuv detsky sbor | 1932 | | |
| Kuchar, Jozef | 1947 | 1988 | |
| Kucharski | 2018 | | |
| Kukulin | | | |
| Kulicky | 1989 | 1992 | |
| Kulturni uderka | 1996 | | |
| Kumandzas. Petr | | | |
| Kunovjan | | | |
| Kuric, Jan | 1985 | | |
| Kurtizany z 25. Avenue | 1989 | | |
| Kusumam | | | |
| Kvartet Emila Viklickeho | | | |
| Kvartet Milana Svobody | | | |
| Kvarteto Igora Nazarjuka | | | |
| Kvarteto Jana Buchara | | | |
| Kvety | 2000 | | |
| Kvietah | 2022 | | |
