- Old Monkland
- Oragaig
- Otter Ferry
- Overtown
- Old Bridge of Urr
- Oldhamstocks
- Ormiston
- Oxgangs
- Oxnam
- Oxton
- Oigh Sgeir
- Old Hill
- Oldany Island
- Orfasay
- Orkney Islands
- Ormal
- Ornsay
- Oronsay
- Oronsay
- Oronsay
- Oronsay
- Orosay
- Orosay
- Orosay
- Orsay Island
- Ose
- Skerries Exteriores
- Outer Flaess
- Outer Hebrides
- Outer Holm