Penang Free School is a secondary school located on Jalan Masjid Negeri (previously Green Lane), George Town, Penang, Malaysia. Although the medium of instruction is now Malay, Penang Free School was the first English-medium school in South East Asia. It is widely recognised as one of Penang's premier schools and alumni are known as "Old Frees". There is a history of rivalry with St. Xavier's Institution, another of Penang's premier schools.