Dun Ringill is an Iron Age hill fort on the Strathaird peninsula on the island of Skye, Scotland. Further fortified in the Middle Ages, tradition holds that it was for several centuries the seat of Clan MacKinnon. It is located east of Kirkibost on the west shore of Loch Slapin.
The original structure of Dun Ringill is consistent with an Iron Age Broch dating to approximately the first years of the common era. The main and subordinate structures have been occupied and modified throughout its history until the 19th century. Tradition relates that the structure was occupied by the MacKinnons as their clan seat well before the 16th century. It is mentioned in historical texts in the 16th century after which the MacKinnons moved their seat to Dunakin.
Dun Ringill today is a stacked stone ruin overlooking Loch Slapin. The present structure is approximately 4 meters in height and 16 meters on each side with a ditch following the outer wall. Its most notable feature is the central landward facing doorway approximately 1.8 meters high that leads into the center of the structure.