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