Treforest (Welsh: Trefforest) is a village in the south-east of Pontypridd, in the county borough of Rhondda Cynon Taf, Wales.

Treforest has two primary schools; Parc Lewis, and St. Michael's; though a third school, Trefforest Primary, closed in 2006 despite the petitions from parents, governors and local councillor, as a result of a process commenced by the 1999–2004 administration on the Rhondda Cynon Taf County Borough Council.

The population of Treforest consists substantially of students living away from home, who often leave the village during the summer months, and return in the new academic year.

This non-profit making company aimed to establish one or more trading estates in Wales, and the first sod was cut on 29 December 1936; 88 years ago (1936-12-29).

The first building contract awarded was a large factory for the British Coated Board and Paper Company Ltd (Wiggins Teape).

Companies which have operated factories on the Estate include: BOAC, Aero Zip, Metal Alloys Ltd, Afon Tinplate Ltd, Finetex Ltd, Ford, South Wales Switchgear, Standard Telephones and Cables, Fram Filters and KLG Spark Plugs.

The composer Morfydd Llwyn Owen (1891–1918) was born in Treforest, and educated at the Royal Academy of Music in London.

[9] She wrote hymns, choral music and orchestral works, often inspired by Welsh literacy and folk songs.

[10] Meic Stephens (1938–2018), the literary journalist, translator, poet and author, who was professor of creative writing and journalism at the University of Glamorgan, was born in Treforest.