Fok or FOK may refer to:

People

• Fok (surname), a list of people with the name

FOK

• FOK!, a Dutch website
• Prague Symphony Orchestra, a Czech orchestra known by the acronym FOK (Film-Opera-Koncert)
• Feeling of knowing
• Fill or kill, an order to buy or sell a stock immediately
• FOK, IATA airport code and FAA location ID for Francis S. Gabreski Airport, Long Island, New York, United States