Dungarvan is a coastal town and harbour in County Waterford, on the south-east coast of Ireland. Prior to the merger of Waterford County …Dungarvan is a coastal town and harbour in County Waterford, on the south-east coast of Ireland. Prior to the merger of Waterford County Council with Waterford City Council in 2014, Dungarvan was the county town and administrative centre of County Waterford. Waterford City and County Council retains administrative offices in the town. The town is in a townland and civil parish of the same name.