| Abbreviation | Definition |
|---|---|
| DBR | Dirt Bike Riders |
| DBR | Dissin Basement Races |
| DCCX | Washington, DC, CycloCross Race |
| DCRE | Division of Culture Race and Ethnicity |
| DDRA | Demolition Derby Racing Association |
| DDRA | Diesel Drag Racing Association |
| DDRA | Dirt Drag Racing Association |
| DDRC | Don Davis Race Cars |
| DEI | Dale Earnhardt Incorporated |
| DERT | Dartmouth Endurance Racing Team |
| DFR | Dartmouth Formula Racing |
| DFR | Dave Freitas Racing |
| DFRT | Diakonie Fund Racing Team |
| DGR | David Gilliland Racing |
| DIRT | Drivers Independant Race Track |
| DIRT | Drivers Independent Race Tracks |
| DIVE | define investigate visualize and embrace |
| DJR | Dick Johnson Racing |
| DKRDS | Diddy Kong Racing DS (gaming) |
| DMBR | Downhill Mountain Bike Racing |