The Nine Castles of Knuckle are a group of ancient castles found in the extinct area of "Knuckle", which today would be located on the very far corner of the north-east coast of Aberdeenshire in the Buchan area of Scotland.
| Castle | Nearest significant settlement(s) | OS Grid Reference | Built by | Construction date | Destruction date | Current condition |
|---|---|---|---|---|---|---|
| Cairnbulg Castle | Cairnbulg | NK017640 | Comyn family, then Fraser Family† | built by Comyns 13th century; rebuilt by Frasers c.1380[1] | still inhabited by a family. (private not open to the public) | |
| Dundarg Castle | New Aberdour | NJ895648 | Comyn family | ruin | ||
| Inverallochy Castle | Inverallochy, St Combs | NK040628 | Comyn family | ruin, only small areas visible | ||
| Kinnaird Castle‡ | Kinnaird Head, Fraserburgh | NJ999675 | ||||
| Castle of Lonmay | Fiddlers Green, Crimond | NK063605 (not shown on modern OS maps) | nothing remains, under sanddunes. | |||
| Pitsligo Castle | Rosehearty | NJ937670 | Fraser family | 1424 | ruin | |
| Pitullie Castle | Rosehearty | NJ944670 | 16th century | ruin | ||
| Castle of Rattray~ | Old Rattray, Rattray, Aberdeenshire | NK088578 | Comyn family (possibly by William Comyn, jure uxoris Earl of Buchan) | early 13th century | unknown for certain, possibly 1308 | destroyed, buried |
| Winetower | Kinnaird Head, Fraserburgh | NJ999675 (not on OS maps, but approximately 50 metres from the Scottish Lighthouse Museum} | ruin | |||
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