| Bands Artists Recordings | shown from 1400 to 1429 (total 2253) |
    |
Name  | active from | active to | |
| OK Band | 1980 |  | |
| Oko | |||
| Okrej | 2007 | ||
| Olaf Olafsonn and the Big Bad Trip | 2016 | | |
| Oliver | |||
| Olmerova, Eva | 1962 | 1993 | |
| Olympic | 1963 | | |
| Omnibus | 1979 | 1990 | |
| One Reason | 2013 | | |
| Oplt, Josef | |||
| OPN | 1974 | 1994 | |
| Orange Pekoe | |||
| Oravec, Vlado | |||
| Orchester Brana Hronca | 1964 | 1982 | |
| Orchester Gustava Offermanna | |||
| Orchester Juraja Velcovskeho | 1963 | 1995 | |
| Orchester Milosa Oberuca | |||
| Orchester Vlada Hronca | |||
| ORCHESTR | 1999 | ||
| Orchestr Bohuslava Ondracka | 1971 | 1972 | |
| Orchestr Cs. televize | 1973 | 1990 | |
| Orchestr Dalibora Brazdy | 1968 | ||
| Orchestr divadla Apollo | 1965 | 1967 | |
| Orchestr divadla Na provazku | |||
| Orchestr divadla Semafor | 1958 | ||
| Orchestr Eduarda Parmy | |||
| Orchestr Eduarda Parmy ml. | 1976 | 1980 | |
| Orchestr Ferdinanda Havlika | 1959 | ||
| Orchestr Frantiska Barty | |||
| Orchestr Golden Kids | 1968 | 1970 |