Tartans A to Z
- O Savanao (District)
- O'Boyle (Name)
- O'Brian #1 (Fashion)
- O'Brien #2 (Fashion)
- O'Brien (Name)
- O'Connell, William (Name)
- O'Connor (Name)
- O'Connor Dress (Fashion?)
- O'Donoghue (Fashion?)
- O'Donohue (Name)
- O'Farrell (Name)
- O'Keefe (Name)
- O'Long (Personal)
- O'Mahony, The (Commemorative)
- O'Malley (Name?)
- O'Meehan (Name)
- O'Monaghan (Personal)
- O'Neill (Australia) (Name)
- O'Neill (District)
- O'Neill (Name)
- O'Neill (Personal)
- O'Neill Pipe Band 1970 (Corporate)
- O'Neill Pipe Band 1983 (Corporate)
- O'Neill Pipe Band 1999 (Corporate)
- O'Neill, Red (Corporate?)
- O'Reilly (Name?)
- O'Rourke (Name?)
- O'Shaughnessy (Name)
- O'Shaughnessy Memorial (Corporate)
- O'Sheehan (Name?)
- O'Sullivan (Name)
- O'Sullivan McCragh (Personal)
- O'Sullivan-Beare (Clan)
- O2 (Corporate)
- Oakhall (Corporate)
- Oakleigh
- Oakleigh (Corporate)
- Oakwood (Fashion)
- Oakwood Purple (Fashion)
- Oban (District?)
- Oban (Fashion)
- Oban Grey (Fashion)
- Oceanic (Corporate?)
- Ochiltree (Name)
- ODL (Corporate)
- Ofally, County (District)
- Offally Crest (Fashion)
- Ogg of Tarragann (Personal)
- Ogg of Tarragann Hunting (Personal)
- Ogilvie