📍 Rumballs Rd, Dacorum, Hertfordshire, HP3 8JB
Longdean School is a Academy converter serving secondary age pupils, located in Dacorum, Hertfordshire. The school has 1,443 pupils enrolled. It was rated Good by Ofsted in 3 December 2025. The Headteacher is Ruth Georgiades. The school is administered by Hertfordshire local authority. It belongs to SCHOLARS' EDUCATION TRUST. It opened in 1 August 2011.