JF
- JFACC – (i) Joint Force Air Component Commander
- JFACTSU – (a) U.S. Joint Forward Air Control Training and Standards Unit
- JFC – (i) Joint Force Commander
- JFCOM – (p) U.S. Joint Forces Command ("jiff-comm")
- JFET – (i/a) Junction Field-Effect Transistor ("jay-fett")
- JFHQ-NCR – (i) Joint Force Headquarters National Capital Region
- JFK – (i) John Fitzgerald Kennedy or the airport named after him.
- JFLCC – (i) Joint Force Land Component Commander
- JFMCC – (i) Joint Force Maritime Component Commander
- JFO – (i) Journal of Field Ornithology
- JFSOCC – (i) Joint Force Special Operations Component Commander
- JFTX – (i) Joint Field Training Exercise
- JFF-Jamaica Football Federation
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