FK or fk may refer to:
Arts and entertainment Fox Kids, an American TV programming block (1990–2002) Funky Kong, a 1994 video game character
Language Finders keepers (English adage) 'Football Club', abbreviated "FK" in Slavic and Balkan countries Fuck, an English-language vulgarity
Places FK postcode area, central Scotland Falkland Islands, a British territory (ISO 3166/FIPS PUB 10-4 :FK)
Science and technology .fk, top-level Internet domain for the Falkland Islands Foreign key, in database design Forward kinematics, in robotics and animation Kinetic friction, in mechanics
Other uses First aid kit First Corridor rail coach Africa West Airlines (IATA airline designator FK)