Sliabh gCua is a traditional district of west County Waterford, Ireland, between Clonmel and Dungarvan, covering areas like Touraneena, Ballinamult and Knockboy. In ancient writings its location was less precisely understood, often encompassing the mountain ranges of the Knockmealdowns, Monavullagh mountain and Comeraghs. It was an Irish-speaking area until the late 19th century. Many people associated with the Irish sean-nós singing tradition, such as Pádraig Ó Mileadha and Labhrás Ó Cadhla, who came from Sliabh gCua. One of the best-loved emigrant songs in the sean-nós canon, Sliabh Geal gCua na Féile, was written by Ó Mileadha while he worked in Wales.
Ancient ogham writings may be observed at the 12th century Knockboy church in the heart of Sliabh gCua. Dan Fraher, after whom the Fraher Field GAA grounds in Dungarvan are named, came from the Skeheens townland of Sliabh gCua and is buried in Knockboy graveyard.
- Ó Conbhuidhe, Colmcille (1992). "Where was Sliabh gCua?" (PDF). Decies. 46 (Autumn): 5-9.