Ysgol Bro Dinefwr is a bilingual secondary school for pupils aged 11–19 in Ffairfach, Carmarthenshire.

[2] These schools were located in Ffairfach and Llandovery, before closure, now occupying a new £30 million school building in September 2016.

[3] The school is categorized linguistically by Welsh Government as a Category 2B school, meaning that at least 80% of subjects, excluding English and Welsh, are taught through the medium of Welsh but are also taught through the medium of English.

[4][5] Science is taught through the medium of English to all classes.

[6] In 2017, 55% of pupils enrolled could speak Welsh fluently.