- Desktop publishing service
- Domestic services
- Dump truck dealer
- Data entry service
- Database management company
- Dental insurance agency
- Drive-in movie theater
- Department of finance
- Driveshaft shop
- Design institute
- Door warehouse
- Designer
- Diving center
- Dive club
- Disabled sports center
- Doula
- Disposable tableware supplier
- Detective
- Dog walker
- Drug testing service