IFK (disambiguation)

IFK may refer to:
 * Idrottsföreningen Kamraterna, a central organisation for many sports clubs in Sweden
 * ifk, the ISO 639-3 code for Tuwali language
 * Incremental frequency keying, a modified type of MFSK modulation
 * Kapitalmarktforschung, an independent research institute affiliated to the Goethe University Frankfurt