Ysgol Dewi Sant is a secondary school in St Davids Pembrokeshire. It started life as a county school in 1895. The school has around 490 pupils and is oversubscribed. In its last Estyn report it gained seven grade ones. The school is undergoing a programme of improvements and refurbishment. Pupils at the school raise money for a number of charities including the Air Ambulance and the SCBU at Withybush Hospital.
Notable pupils/ex-pupils include Simon Davies, Rowland Phillips, Ian Walsh and Lloyd Evans.