Crawfurdsdyke is an historic Burgh of Barony, historically being part of the Barony of Cartsburn. The estate of Cartsburn, also known as Crawfurdsburn, incorporated the lands of Cartsdyke and part of the lands of Easter Greenock Castle. The Barony of Cartsburn is a feudal Barony of Scotland. The seat of the Barony was the House of Cartsburn, built in the 17th century near Greenock, Renfrewshire. While the ancient Burgh was subsumed into Greenock in 1840.