Ioannis Agorastos "John" Plagis, DSO, DFC & Bar (1919–1974) was a Southern Rhodesian flying ace in the Royal Air Force (RAF) during the Second World War, noted especially for his part in the defence of Malta during 1942. The son of Greek immigrants, he was accepted by recruiters only after Greece joined the Allies in late 1940. Following spells with No. 65 Squadron and No. 266 (Rhodesia) Squadron, he joined No. 249 (Gold Coast) Squadron in Malta in March 1942. Flying Spitfire Mk Vs, Plagis was part of the multinational group of Allied pilots that successfully defended the strategically important island against numerically superior Axis forces over the next few months. Flying with No. 185 Squadron from early June, he was withdrawn to England in early July 1942.