NCA is an abbreviation for:

  • N- carboxy anhydrides, an important class of monomers for synthesis of polypeptides
  • Namibia Commercial Aviation, a Namibian airline, based in Windhoek
  • National Coffee Association of USA, the trade and lobbying association of the coffee industry in the U.S.
  • National Command Authority, the highest military command of the United States
  • Nautic Club Austria, Graz, a sailing club
  • Nicaragua, a country in Central America, an Olympic country code
  • Nippon Cargo Airlines, a Japanese cargo carrier
  • Non Compartmental Analysis, a type of evaluation of pharmacokinetic data
  • Disambiguation
  • Abbreviation