Blaina is a small town, situated deep within the South Wales Valleys between Brynmawr and Abertillery in the unitary authority of Blaenau Gwent, ancient parish of Aberystruth, preserved county of Gwent and historic county of Monmouthshire. The place name is derived from the Welsh word blaenau "uplands". As of 2011, the town has a population of 4,808.