| LDDC | La Descente Du Coude 
| Others |
| LDDC | Least Developed Developing Country
| Others |
| LDDC | Livestock Disease Diagnostic Center
| Others |
| LDDC | London and District Distress Centre (London, Ontario, Canada)
| Others |
| LDDC | London Docklands Development Corporation
| Others |
| LDDC | Louisa Downtown Development Corporation
| Others |
| LDDC | Louisiana Developmental Disabilities Council
| Others |
| LDDC | Louisville Downtown Development Corporation
| Others |
| LDDC | Lyme Disease Diagnostic Center
| Others |