Ynyswen consists mostly of housing. It has an industrial estate which was once the site of Burberry's factory, one shop, and the Forest View Medical Centre.
The area has several chapels and churches as well as Ynyswen Infant school and Ynyswen Welsh School.
Ynyswen infant's school takes children until the age of 7. From then they must go to a different primary school: usually Penyrenglyn Primary School or Treorchy Primary School. Ynyswen Welsh School is a Welsh-speaking primary school that serves the Rhondda Valley. There is no nearby Welsh-speaking comprehensive school and so pupils mostly attend a Welsh school some miles away.