Drest mac Caustantín was king of the Picts, in modern Scotland, from about 834 until 836 or 837. He was the son of King Caustantín and succeeded his uncle, Óengus, to the throne.
The length of his reign is based on the various Pictish king lists, where he is associated with Talorgan son of Uuthoil. Some sources, such as John of Fordun, conflate the two kings as "Durstolorger", perhaps under the influence of the earlier "Dubthalorc".
It was once thought that Pictish kings in this period were also kings of Dál Riata, but this is no longer supported.
| Regnal titles | ||
|---|---|---|
| Preceded by Óengus (II) |
King of the Picts 834–836x837 |
Succeeded by Eogán |