| Llanfyllin High School | |
| Native Name: | Ysgol Uwchradd Llanfyllin |
| Coordinates: | 52.7638°N -3.2719°W |
| Closed: | 2020 |
| Type: | Secondary School |
| Language: | English / Welsh bilingual |
| Head: | Dewi Owen |
| City: | Llanfyllin |
| County: | Powys |
| Country: | Wales |
| Lea: | Powys County Council |
| Enrolment: | 824 (February 2016)[1] |
| Gender: | Mixed |
| Lower Age: | 11 |
| Upper Age: | 18 |
Llanfyllin High School (cy|Ysgol Uwchradd Llanfyllin) was a bilingual secondary school situated in the mid-Wales town of Llanfyllin. As of its final Estyn inspection in February 2016, it had 824 pupils, down from 1,001 in 2009.[1]
Around one fifth of its pupils lived across the English border in Shropshire, and 18% spoke Welsh as a first language as of 2016. Only one pupil was learning English as a foreign language. The proportion of pupils with special educational needs was lower than the national average, and 6% qualified for free school meals, compared to a national average of 17.4%.[1]
As a bilingual school, Llanfyllin High School had a Welsh language stream in which most subjects were taught in Welsh, and an English language stream in which most subjects were taught in English. Some courses were taught bilingually.[2] A group of pupils in years 6 to 9 participated in a project named Trochi (Immersion) to increase their fluency in Welsh and allow them to transfer to the Welsh language stream.[3]
The school closed in 2020, merging with Llanfyllin Community Primary School to form an all-through school, Ysgol Llanfyllin.[4]