| Abbreviation | Definition |
|---|---|
| DCCU | District of Canterbury Credit Union |
| DCTU | Dublin Council of Trade Unions |
| DDAM | Delivery Drivers Association of Manitoba |
| DDCU | Dunfermline and District Credit Union |
| DDCU | Dunnville and District Credit Union |
| DDCU | Durban and Districts Cricket Union |
| DDPU | Doctors and Dentists Protection Union |
| DECU | Decatur Earthmover Credit Union |
| DECU | Deere Employees Credit Union |
| DECU | Delta Employees Credit Union |
| DESOPADEC | Delta State Oil Producing Areas Development Commission |
| DEU | Duplicates Exchange Union |
| DFCU | Dakotaland Federal Credit Union |
| DFCU | Denali Federal Credit Union |
| DFCU | Deseret First Credit Union |
| DFCU | Diebold Federal Credit Union |
| DFCU | Digital Federal Credit Union |
| DFCU | Dillards Federal Credit Union |
| DFCU | Dillard's Federal Credit Union |
| DFCU | Dover Federal Credit Union |