XF5

XF5 may refer to:

Aviation

 * Grumman XF5F Skyrocket, experimental twin-engined interceptor
 * IHI Corporation XF5. turbofan jet engine
 * Northrop F-5 (experimental designation XF5-A), supersonic light fighter
 * Vought XF5U "Flying Flapjack", experimental disc-winged fighter

Other uses

 * The X Factor (British series 5), British TV series