Treforest is a village in the south-east of Pontypridd in the county borough of Rhondda Cynon Taf, Wales situated in the Treforest electoral ward along with the village of Glyntaff (or Glyn-Taf), being part of the Pontypridd Community. Treforest runs along the west bank of the River Taff  while Glyntaff runs along its east bank.