Starting with O
| Station name | Area | |
|---|---|---|
| Oak FM (Hinckley) | Hinckley & Nuneaton | |
| Oak FM (Loughborough) | Loughborough | |
| Oban FM | Oban | |
| Ocean FM | Sligo, North Leitrim and South Donegal | |
| Off The Chart Radio | Internet | |
| Offshore Music Radio | Internet | |
| Oldham Community Radio | Oldham | |
| BBC Radio 1 | UK | |
| BBC 1Xtra | UK | |
| RTÉ Radio 1 | Ireland and UK | |
| 101.4 OnFM | Hammersmith and Fulham | |
| Orbit Rock | AfriStar - All | |
| Original 106fm (Aberdeen) | Aberdeen | |
| Original 106.5 Bristol | Bristol | |
| Our Kind of Music | Internet | |
| BBC Oxford 95.2FM | Oxfordshire | |
| Oxford's FM107.9 | Oxford | |
| Oxide Radio | Oxford University | |
| Oxygen Radio | Internet |
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