Dun Cruinn is a prehistoric site about 10 kilometres (6.2 mi) north-west of Portree, on the Isle of Skye, Scotland.

There is a fort on a rocky knoll: it is an irregular oval, about 95 metres (312 ft) north-northwest to south-southeast, by 25 metres (82 ft), enclosing a area of about 0.19 hectares (0.47 acres).

The wall of the fort is now seen as a band of rubble, about 3 metres (9.8 ft) thick, best preserved in the north.

It is divided about midway by a rampart and ditch.

[2] In the south of the fort are the remains of a dun (or broch), built later than the fort, diameter about 20 metres (66 ft) and having a maximum height of 1.5 metres (4.9 ft).