IK

IK or Ik may refer to:

Businesses and organizations

 * IK Investment Partners, a European private equity firm
 * Imair Airlines (IATA code IK)
 * Iparretarrak, a Basque nationalist organization

Languages

 * Ik language (ISO 639 alpha-3 ikx), spoken by the Ik people of Uganda
 * Inupiaq language (ISO 639 alpha-2), a group of dialects of the Inuit language, spoken in Alaska

Places

 * Ik (river), a tributary of the Kama in Bashkortostan and Tatarstan, Russia
 * Ik (Berd), a tributary of the Berd in Novosibirsk Oblast, Russia
 * Bolshoy Ik, a tributary of the Sakmara in Bashkortostan and Orenburg Oblast, Russia
 * Ilm-Kreis, a region in Germany

Science and technology

 * IK (gene), a protein-encoding gene
 * IK code, a classification of resistance to mechanical impacts
 * Internationale Kerze (German for "international candle"), an old photometric unit to measure luminous intensity
 * Inverse kinematics, a branch of mechanics

Other uses

 * Ik Onkar, a symbol used in the Sikh religion
 * Ik people of Uganda
 * The Ik, a 1975 play by Colin Higgins and Denis Cannan