From Henley, West Sussex to all cities in Somerset starting with letter O
- Oake, West Sussex
- Oake Green, West Sussex
- Oakhill, West Sussex
- Oare, West Sussex
- Oareford, West Sussex
- Oath, West Sussex
- Obridge, West Sussex
- Odcombe, West Sussex
- Odd Down, West Sussex
- Old Cleeve, West Sussex
- Old Ditch, West Sussex
- Old Down, West Sussex
- Old Way, West Sussex
- Oldfield Park, West Sussex
- Oldford, West Sussex
- Oldmixon, West Sussex
- Orchard Portman, West Sussex
- Othery, West Sussex
- Otterford, West Sussex
- Otterhampton, West Sussex
- Outwood, West Sussex
- Over Stowey, West Sussex
- Over Stratton, West Sussex
- Overleigh, West Sussex
- Overton, West Sussex
- Oxenpill, West Sussex