| Abbreviation | Definition |
|---|---|
| JCA | Joint Construction Agency |
| JCAC | Joint Civil Affairs Committee |
| JCAHO | Joint Commission on Accreditation of Healthcare Organizations |
| JCP | Judicial Computer Project |
| JCP | Justify Current Procedure |
| JCS | Joint Country Support |
| JCSE | Just Continue Spending on Everything |
| JCSS | Joint Country Support Strategy |
| JCSW | Joint Committee on the Status of Women |
| JCT | Joint Contracts Tribunal |
| JCUS | Joint Center for Urban Studies |
| JD | Japanese Department |
| JD | Joint Determination |
| JEDI | Joint Energy Development Investments |
| JEM | Joint Emergency Management |
| JEO | Joint Elected Officials |
| JFK | John Fitzgerald Kennedy |
| JFO | Jackson Field Office, Bureau of Land Management |
| JFR | Joint Funds Reimbursement |
| JFRV | Joining Family Resident Visa |