- Oakhurst to The Tank Stream
- Oakville to The Tank Stream
- Oatlands to The Tank Stream
- Oatley to The Tank Stream
- Old Guildford to The Tank Stream
- Old Toongabbie to The Tank Stream
- Oran Park to The Tank Stream
- Orchard Hills to The Tank Stream
- Oxford Falls to The Tank Stream
- Oxley Park to The Tank Stream
- Oyster Bay to The Tank Stream
- Sydney Airport to The Tank Stream
- The Tank Stream to Oakhurst
- The Tank Stream to Oakville
- The Tank Stream to Oatlands
- The Tank Stream to Oatley
- The Tank Stream to Old Guildford
- The Tank Stream to Old Toongabbie
- The Tank Stream to Oran Park
- The Tank Stream to Orchard Hills
- The Tank Stream to Oxford Falls
- The Tank Stream to Oxley Park
- The Tank Stream to Oyster Bay
- The Tank Stream to Sydney Airport