Air vice-marshal John Denis Breakey CB, DFC & Bar (19 May 1899 – 8 January 1965) was a senior officer of the Royal Air Force. He began his military career in the Royal Naval Air Service during World War I. As the RNAS was merged into the Royal Air Force, he scored nine aerial victories as a fighter pilot. He served throughout the interwar period and into World War II, rising to air vice marshal.