KSF may refer to:

  • Kassel Airport, IATA code
  • Key shock factor, a "shock factor value" for assessing the damages that may be caused by a torpedo explosion
  • Key success factor
  • Kjøbenhavns Skøjteløberforening
  • Kosovo Security Force
  • Potassium fluorosilicate (K2[SiF6]), specifically when referring to KSF phosphors used in warmer white LED with improved red band emission