Rhydyfelin (Welsh pronunciation: [r̥idəˈvɛlɪn]) is a large village (originally known as Rhydfelen) and part of the community of Pontypridd Town, about 2 miles (3.2 km) to its south east of Pontypridd, in the county borough of Rhondda Cynon Taf.

It is on the eastern bank of the River Taff, close to the A470, and historically was in the parish of Eglwysilan.

It grew from a rural hamlet to a thriving village in the 19th century, due to its location on the Glamorganshire Canal which took iron from Merthyr Tydfil to the city of Cardiff, and linking to this Dr Richard Griffiths' canal and tramway which took coal from the Rhondda Valleys.

The view from lower Rhydyfelin of Eglwysilan mountain shows the locally known 'Monkeys Tump'.

The first Welsh language secondary school in South Wales, Ysgol Gyfun Rhydfelen, was established at Rhydyfelin[5] in 1962.