This category is for websites based in, or exclusively about, the town of Abertillery on the east bank of the River Tyleri, in Ebbw Fach valley, north of  Aberbeeg, south of Blaina on the A465 to  Brynmawr, in the county borough of Blaenau Gwent.
The eastern boundary is the top of Gwastad, the county boundary with  Torfaen, with  Abersychan in the Afon Lwyd valley below.