A&D

A&D may refer to:


 * Akrotiri and Dhekelia, two UK-administered areas on the island of Cyprus that comprise the Sovereign Base Areas military bases of the United Kingdom
 * A&D Company, Limited, a Japanese manufacturer of medical equipment and laboratory testing equipment; it refers to "analog and digital"
 * Angels & Demons, a book by American author Dan Brown
 * Aerospace & Defense, the defense industry