Fairlie Castle is a restored oblong tower castle located on a natural rounded knoll situated above a precipitous section of the Fairlie Glen near the town of Fairlie in the old Barony of Fairlie, Parish of Largs, North Ayrshire, Scotland. It was built by the now extinct family, the Fairlies of that Ilk and survives in a fairly good state of preservation. It is a protected scheduled monument.