Knock Iveagh (from Irish Cnoc Uíbh Eachach 'hill of Iveagh') is a hill near Rathfriland, County Down, Northern Ireland. It is topped by an ancient burial cairn and was part of a ritual landscape, associated with the Uí Eachach tribe. In the Middle Ages it was the inauguration site of the Magennis chiefs of Iveagh.