| Abbreviation | Definition |
|---|---|
| LDF | Lucy Daniels Foundation |
| LDFA | Learning Disabilities Foundation of America |
| LDFT | Longitudinal Dental Foundation Training |
| LEAD | Learn Empower Aim Dedicate |
| LEAF | Life Extension Advocacy Foundation |
| LEEF | Lenox Education Enrichment Foundation |
| LEF | Lafayette Education Foundation |
| LEF | Land Economics Foundation |
| LEF | Law Enforcement Foundation |
| LEF | Lebanon Educational Foundation |
| LEF | Lexington Education Foundation |
| LEF | Life Extension Foundation |
| LEF | Loudoun Education Foundation |
| LEF | Luxury Education Foundation |
| LEIF | Leif Erikson International Foundation |
| LEVF | League of Education Voters Foundation |
| LFAF | Local First Arizona Foundation |
| LFAPA | Learning Foundation and Performing Arts |
| LFCF | Lake Fork Community Foundation |
| LFCF | Launchpad For Charity Foundation |