IKA may refer to:
- Industrias Kaiser Argentina, former Argentine motor company
- Internationale Kochkunst Ausstellung (IKA), the International Exhibition of Culinary Art or Culinary Olympics
- International Kashmir Alliance
- Imperial Klans of America, Knights of the Ku Klux Klan, a white supremacist organization
- Social Insurance Institute (IKA), state-run social security organisation in Greece
- IATA code of Tehran Imam Khomeini International Airport
- Abbreviation for International Karate Association
- Abbreviation for International Kiteboarding Association