Coordinates: 51°46′40″N 3°12′42″W / 51.7779°N 3.2117°W / 51.7779; -3.2117. Ebbw Vale (/ˈɛbuː veɪl/; Welsh: Glyn Ebwy) is a town at the head of the valley formed by the Ebbw Fawr tributary of the Ebbw River in Wales. It is the largest town and the administrative centre of Blaenau Gwent county borough. The Ebbw Vale and Brynmawr conurbation has a population of roughly 33,000.