F2 or F-2 can mean:

• Formula Two, a type of formula motor racing.
• Mitsubishi F-2, a Japanese fighter aircraft based on the F-16 Fighting Falcon.
• F-2 Banshee, a carrier-based jet fighter aircraft of the 1950s.
• Beechcraft F-2 Expeditor
• HMS F2 , an F-class submarine of the Royal Navy.
• A key on a computer keyboard, see function key