| Acronym | Definition |
|---|
| FESG | Federação do Espírito Santo de Ginástica (Portuguese: Federation of the Holy Spirit Gymnastics; Brazil) |
| FESG | Forecast and Economic Support Group (Committee on Aviation Environmental Protection) |
| FESG | Forschungseinrichtung Satellitengeodäsie (Technische Universität München; Germany) |
| FESG | Fonds pour l'Education et la Saine Gouvernance (French: Funds for Education and Good Governance; Canada) |
| FESG | Federal Emergency Shelter Grant |
| FESG | First Easthampstead Scout Group (UK) |
| FESG | Family Education and Support Group |