Name  | active from | active to | |
| Jezil, Milos | | | |
| Jihoceska filharmonie | | | |
| Jina rychlost casu | 1992 | 1993 |  |
| Jindrak, Jindrich | | | |
| Jiran, Jan | 1977 | | |
| Jirous, Martin (Magor) | | | |
| Jiri Stivin & Co Jazz System | 1971 | | |
| Jisova, Pavlina | 1980 | | |
| Jitka Suranska trio | 2014 | 2019 | |
| Jizerska protez | 1972 | | |
| Jizni pol | 1983 | 1991 | |
| Jock the Lock | 2009 | | |
| JOCR | 1960 | | |
| Joe Carnation Band | | | |
| John Dovanni | 1990 | 1995 | |
| John McLaughlin Duo | | | |
| Johnova, Marketa | 1970 | 2000 | |
| Jolly Joker and The Plastic Beatles of the Univers | 1991 | | |
| Jonas, Gabriel | | | |
| Jonika Quintet | | | |
| Jordak, Frantisek | | | |
| Joy | | | |
| Juanita Juarez | 2001 | | |
| Jugend | | | |
| Jukkis Uotila Band | | | |
| Julia | | | |
| Julo Kazimir & Olo Lachky | 1979 | | |
| Junas, Daniel | 1980 | | |
| Junas, Dano | 1978 | | |
| Junior | 1970 | 1976 | |
