FJg
| Acronym | Definition |
|---|---|
| FJg | Feldjäger (German military) |
| FJg | Fugro Jacques GeoSurveys, Inc. (est. 1996; Canada) |
| FJg | Fleischer Jacobs Group (South Burlington, VT) |
| FJg | Fisher Jones Greenwood, LLP (England, UK) |
| FJg | Fonda, Johnstown, Gloversville (railroad) |