JDA

JDA may refer to:


 * JDA Software, an American software and consultancy company
 * JDA Dijon Basket or Jeanne d'Arc Dijon Basket, a French basketball club
 * JDA Dijon Handball or Jeanne d'Arc Dijon Handball, a French handball club
 * Janne Da Arc, a Japanese rock group
 * Japan Defense Agency, the former name of the Japanese Ministry of Defense
 * Japan Dental Association
 * Jersey Democratic Alliance
 * Jerusalem Declaration on Antisemitism
 * Jerusalem Development Authority
 * Grant County Regional Airport (IATA code) in John Day, Oregon
 * Joint defense agreement, an extension of attorney-client privilege
 * JDA, a quarterfinalist on the twelfth season of American Idol