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| Tartan Name | Oakland Centre | | | | Category | Corporate
| Reference | 11587 | | Designer | Oakland Centre Service Users/Warpweftweave Studio | | | | Date Recorded | 13/07/2016 | | |
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| Tartan Name | Oakley (2015) | | | | Category | Name
| Reference | 11255 | | Designer | Oakley, R | | | | Date Recorded | 18/03/2015 | | |
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| Tartan Name | Oakwood | | | | Category | Fashion
| | | | Designer | Not Specified | STA Ref | 5532 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Obama Family | | | | Category | Commemorative
| Reference | 11839 | | Designer | Halley, Brian Slanj Kilts | | | | Date Recorded | 03/07/2017 | | |
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| Tartan Name | Oban | | | | Category | Fashion
| | | | Designer | West Coast Woolen Mill | STA Ref | 5529 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Oban Distillery | | | | Category | Corporate
| Reference | 15271 | | Designer | Lochcarron of Scotland | | | | Date Recorded | 11/02/2026 | | |
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| Tartan Name | Oban Grey | | | | Category | District
| | | | Designer | Not Specified | STA Ref | none | | Date Recorded | Not Specified | STWR Ref | 1237 |
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| Tartan Name | Oban Mist | | | | Category | Fashion
| Reference | 11010 | | Designer | Teviotdale, Gemma | | | | Date Recorded | 17/03/2014 | | |
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| Tartan Name | Oberon Black | | | | Category | Corporate
| Reference | 14984 | | Designer | Kinloch Anderson Ltd | | | | Date Recorded | 26/08/2025 | | |
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| Tartan Name | Ocean Sciences 2026 | | | | Category | Corporate
| Reference | 14620 | | Designer | Wilton, Brian | | | | Date Recorded | 21/01/2025 | | |
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| Tartan Name | Ochil Flora | | | | Category | Fashion
| Reference | 13156 | | Designer | Hunter, Claire | | | | Date Recorded | 11/05/2021 | | |
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| Tartan Name | Ocho de Febrero | | | | Category | Fashion
| Reference | 13851 | | Designer | McGreechin, Erin and Teviotdale, Gemma | | | | Date Recorded | 21/03/2023 | | |
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| Tartan Name | Ochterlonie | | | | Category | Clan/Family | | | | Designer | Dalgliesh, D C | STA Ref | 2677 | | Date Recorded | Not Specified | STWR Ref | 2677 |
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| Tartan Name | OCLEES | | | | Category | Corporate
| Reference | 12955 | | Designer | Brown, Craig | | | | Date Recorded | 20/10/2020 | | |
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| Tartan Name | ODL | | | | Category | Corporate
| | | | Designer | Not Specified | STA Ref | 7832 | | Date Recorded | Not Specified | STWR Ref | none |
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| Tartan Name | Oeufs Brouilles | | | | Category | Fashion
| Reference | 14830 | | Designer | Wakui, Mayumi | | | | Date Recorded | 27/05/2025 | | |
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| Tartan Name | Ofally, County | | | | Category | District
| | | | Designer | House of Edgar - Macnaughton Holdings Ltd. | STA Ref | 2268 | | Date Recorded | Not Specified | STWR Ref | 2268 |
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