F13

F13, F 13, F.13 or F-13 may refer to:

• F 13 Norrköping, a former Swedish Air Force wing
• F-13 Superfortress, B-29 Superfortress bombers modified for photographic recon duties
• Junkers F.13, the world's first all-metal airliner
• LSWR F13 class, a 1905 British 4-6-0 steam locomotive model
• Florencia 13, a Hispanic gang in Los Angeles
• Fluorine-13 (F-13 or ¹³F), an isotope of fluorine
• Stephen King's F13, a video game
• f¹³, Family 13, a group of Greek gospel manuscripts
• Friday the 13th, which is considered an unlucky day in Western superstition
• Friday the 13th (franchise), a series of horror films
• Triskaidekaphobia, the fear of the number 13
• a function key labeled F13 on some computer keyboards
• the ICD-10 code for Mental and behavioural disorders due to use of sedatives or hypnotics
• a third generation BMW 6 Series coupe
• Samsung Galaxy F13, an Android-based smartphone manufactured by Samsung Electronics.