The Wibault 9 or Wib 9 was a single seat, parasol wing fighter aircraft designed and built in France in the 1920s.
It was designed and built during the competitive trials held in Villacoublay in 1926–1927, after which the lowly placed Wib 7 won a small order of 25 machines.
There were cabane struts over the fuselage and a trailing edge cut-out in the wing over the pilot's cockpit to enhance his visibility.
The two designs shared the same flat sided fuselage and angular empennage, though the fin of the Wib 9 was noticeably broader.
Limited flight trials suggested it was a little faster than the Wib 7 but no production contract followed and development was soon ended.