- J5 (Joint Strategic Plans & Policy Directorate)
- J-5 (Plans Directorate of A Joint Staff)
- J6 (Joint Information Technology Directorate (Command, Control, Communications & Computer Systems))
- J-6 (Command, Control, Communications, and Computer Systems Staff Section)
- J7 (Joint Operational Plans & Interoperability Directorate)
- J-7 (Engineering Staff Section)
- J-7/JED (Exercises and Training Directorate of A Joint Staff)
- J8 (Joint Force Structure, Resources, & Assessment Directorate)
- J-8 (Director For Force Structure, Resource, and Assessment, Joint Staff)
- J9 (Joint Public Affairs Directorate (Civilian-Military Cooperation))
- J-9 (Civil-Military Operations Directorate of A Joint Staff)
- JA (Judge Advocate)
- J-A (Judge Advocate Directorate of A Joint Staff)
- JA/ATT (Joint Airborne/ Air Transportability Training)
- JAA (Jalalabad Airport)
- JAAA (Jayhawk Area Agency on Aging)
- JAAR (Joint After-Action Report)
- JAARS (Joint After Action Reporting System)
- JAAS (Java Authentication and Authorization Service)
- JAAT (Joint Air Attack Team)
- JAAWS (Journal of Applied Animal Welfare Science)
- JAB (Jabiru Airport)
- JAC (Jackson Hole Airport)
