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