| Initial letter: O |
| Grid Ref | Start place | Detail |
| SP641122 | Oakley, in the lane/grass area near the church |
| SU214754 | Ogbourne St George | Ridgeway crossing with Copse Drove. |
| SU203742 | Ogbourne St George, near the Parklands Hotel |
| SP504063 | Osney Tow Path |
| SP570126 | Otmoor RSPB car park. Approach from Beckley; it is at the end of Otmoor Lane | Around the reserve; a chance to observe the wildlife. |
| SP410221 | Over Kiddington, the post office A44 cross roads | Public transport available. |
| SP094571 | Oversley Green | The sport ground on Old Stratford Road just short of Alcester. |
| SU118680 | Overton Hill, Ridgeway car park |
| SP507106 | Oxford | Cutteslowe Park, Harbord Road car park. |
| SP514055 | Oxford | Folly Bridge (East side), start of Thames path. |
| SP500060 | Oxford | The Oatlands Road recreation ground car park, off the Ferry Hinksey Road. |
| SP566074 | Oxford | Thornhill park & ride car park. |
| SP499059 | Oxford, Ferry Hinksey Road | Car park on roadside. |
| SP514055 | Oxford, Folly Bridge |
| SP509063 | Oxford, Gloucester Green |
| SP072548 | Oxford, Headington, London Road, corner of Wharton Road | Buses 7, 8 & 10 from the city centre. |
| SP552067 | Oxford, Headington, the Coach House, Quarry Road, OX3 8NU |
| SP515049 | Oxford, Hinksey Pool car park |
| SP513065 | Oxford, Martyrs' Memorial |
| SP533085 | Oxford, OXSRAD car park, Marsh Lane |
| SP503704 | Oxford, Port Meadow, Walton Well Road car park |
| SP519039 | Oxford, Redbridge Park & Ride |
| SP491063 | Oxford, Seacourt Park & Ride |
| SP564063 | Oxford, Shotover country car park |
The car park off Old Road, Headington.
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