From Carlton Ashes, Lincolnshire to all cities in Northumberland starting with letter O
- Oakwood, Lincolnshire
- Ogle, Lincolnshire
- Old Bewick, Lincolnshire
- Old Swarland, Lincolnshire
- Ordley, Lincolnshire
- Otterburn, Lincolnshire
- Otterburn Camp, Lincolnshire
- Ouston, Lincolnshire
- Ovingham, Lincolnshire
- Ovington, Lincolnshire