Pentrebach is a village in Merthyr Tydfil County Borough, Wales.
Pentre Bach is a Welsh language television programme for young children.
Pentrebach, Pentre-bach or Pentre Bach (meaning Small village in English) can also refer to:
Pentre-bach, Powys, a hamlet in Powys, Wales Pentre-bach, Ceredigion, a small village in Lampeter, Ceredigion, Wales Pentrebach, Swansea, a village in City and County of Swansea, Wales Pentrebach, Rhondda Cynon Taf a village in Coedpenmaen, Pontypridd district, Rhondda Cynon Taf, Wales Pentre-bach railway station, Merthyr Tydfil, Wales