Dun Carloway is a broch situated in the district of Carloway, on the west coast of the Isle of Lewis, Scotland. It is a remarkably well preserved broch – on the east side parts of the old wall still reach to 9 metres tall.

In archaeology, a broch is an Iron Age drystone hollow-walled structure found in Scotland. Brochs belong to the classification "complex Atlantic roundhouse" devised by Scottish archaeologists in the 1980s.