KDA or similar may refer to:

  • Combat Groups of the Working Class (German: Kampfgruppen der Arbeiterklasse), a paramilitary organization in East Germany
  • Karachi Development Authority, an urban development organization in Karachi, Pakistan
  • Kilodalton (kDa), 1000 unified atomic mass units
  • Kongsberg Defence & Aerospace, a Norwegian supplier of defence and space related systems and products
  • Kotelawala Defence Academy, a Sri Lankan joint services academy now called Kotelawala Defence University
  • Kramer Design Associates, a Canadian graphics design company
  • Potassium diisopropylamide, a strong base used in organic chemistry similar to lithium diisopropylamide
  • Worimi language, an Australian Aboriginal language