Douglas Insurance Services Group — Dream Building
- Douglas Insurance Services Group
- Dovercraft Yachts
- Downeast Boats && Composites
- DownWind Dockside Services in Narragansett Bay
- Downwind Marine
- Downwind Marine
- Doyle Sailmakers
- Doyle Sailmakers
- Dozier Yachting Centers
- DP Marine Electronics
- Dr. Shrink
- Draft & Freeboard Indicator for Marine Surveyors
- Drag Boat Alley
- Drag Boat City
- DragBoatRacing
- Dragonfly Canoe
- Dragonfly Sailboats Co.
- Dragons, Etchells, Liberties
- Drascombe Lugger, Repair and Maintenance
- Dream Building