The fine harbour in Carnlough was built by the Marchioness of Londonderry around 1850. Limestone continued to be exported from there until 1945 when the Glencloy quarries closed down. The Eglinton Lime Company of Glenarm used the harbour for several years until the late fifties when silting became a problem. The harbour is still used by yachts and pleasure boats.

George Shiels, one of Ireland's best known playwrights, lived in Carnlough from 1932 until his death in 1945.

Farming and the tourist industry provide the main sources of income for the area.