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| Civil Parish | Council Area | County 1891 | Notes |
|---|---|---|---|
| Oathlaw | Angus | Forfarshire | |
| Ochiltree | East Ayrshire | Ayrshire | |
| Old Cumnock | East Ayrshire | Ayrshire | |
| Old Deer | Aberdeenshire | Aberdeenshire | Partly in Banffshire until 1891 |
| Old Kilpatrick | West Dunbartonshire | Dunbartonshire | |
| Old Luce | Dumfries and Galloway | Wigtownshire | |
| Old Machar | City of Aberdeen | Aberdeenshire | |
| Old Monkland | City of Glasgow North Lanarkshire |
Lanarkshire | |
| Oldhamstocks | East Lothian Scottish Borders |
Haddingtonshire | Partly in Berwickshire in 1891 |
| Olrig | Highland | Caithness | |
| Ordiquhill | Aberdeenshire | Banffshire | |
| Ormiston | East Lothian | Haddingtonshire | |
| Orphir | Orkney | Orkney | |
| Orwell | Perth and Kinross | Kinross-shire | |
| Oxnam | Scottish Borders | Roxburghshire | |
| Oyne | Aberdeenshire | Aberdeenshire |
Read more about this topic: List Of Civil Parishes In Scotland