From Wesham, Lancashire to all cities in Greater Manchester starting with letter O
- Oak Bank, Lancashire
- Oaken Bottom, Lancashire
- Offerton, Lancashire
- Offerton Green, Lancashire
- Old Birtle, Lancashire
- Old Tame, Lancashire
- Old Trafford, Lancashire
- Oldfield Brow, Lancashire
- Oldham, Lancashire
- Oldham Edge, Lancashire
- Oozewood, Lancashire
- Openshaw, Lancashire
- Ordsall, Lancashire
- Orrell, Lancashire
- Orrell Post, Lancashire
- Outwood, Lancashire
- Outwood Gate, Lancashire
- Over Hulton, Lancashire
- Owler Barrow, Lancashire