Colonel Edgar O'Ballance (17 July 1918, Dublin, Ireland – 8 July 2009, Wakebridge, Derbyshire, England) was a British military journalist, researcher, defence commentator and academic lecturer specialising in international relations and defence problems. He served in the British and Indian armies until 1948. He worked as a journalist for a US Wire Agency from 1948 to 1962, and was thereafter a freelance journalist. He covered over twenty wars and insurgencies and wrote extensively on international relations, defence and strategic problems. He was a member of the International Institute for Strategic Studies and Chairman of the London-based Military Commentators' Circle. He wrote many articles for military journals and was the author of over forty books.