| Acronym | Definition |
|---|
| DeCA | Defense Commissary Agency (US DoD) |
| DeCA | Delta Epsilon Chi |
| DeCA | DirecTV Ethernet over Coax Adapter (Internet connectivity) |
| DeCA | Defense and Economic Cooperation Agreement |
| DeCA | [not an acronym] (formerly Distributive Education Clubs of America) |
| DeCA | Development of Espionage, Counterintelligence and Counterterrorism Awareness (now Awareness of National Security Issues and Response) |
| DeCA | Digital Electronic Control Assembly |
| DeCA | Danish Enterprise and Construction Authority (Denmark) |
| DeCA | Defense Economic Cooperation Agreement |
| DeCA | Debt Education and Counseling Association (Fredericktown, OH) |
| DeCA | Department of Education and Curriculum Affairs |
| DeCA | Digital Electronic Countermeasures Analyser |