DED may refer to:
- Dead End Derby, roller derby league in Christchurch, New Zealand
- Dedicated hosting service, a type of Internet hosting
- Death effector domain, a signalling pathway in cell biology
- Deutscher Entwicklungsdienst, German Development Service
- District Electoral Division, a low-level territorial division in Ireland
- Doctor of Education, correctly spelled D.Ed. or Ed.D.
- Dutch elm disease, fungal disease of elm trees
- Dravidian Etymological Dictionary by Thomas Burrow and M. B. Emeneau
- Deferred Enforced Departure, an immigration status in the U.S. similar to Temporary Protected Status
- Double error detection, a form of error-correcting code
- Dragging Equipment Detector, a piece of railroad equipment placed on the track used to detect any part of the train that is dragging on the ground — a type of Defect detector