Ysgol y Gwendraeth was a secondary comprehensive school for pupils aged 11 to 18 in the Gwendraeth Valley, Carmarthenshire, Wales. Situated in the village of Drefach, it had 312 pupils in 2012. The School was effectively closed in 2013 when it was merged with Ysgol Maes Yr Yrfa and teaching at the Ysgol y Gwendraeth site in Drefach ceased. This merger eventually led to Ysgol Maes Y Gwendraeth.