- DADD stands for Démarche Active de Découverte (French: Active Approach to Discovery; education)
- DADD stands for Dads Against Daughters Dating
- DADD stands for Daughters against Drunk Driving
- DADD stands for Direct Action Against Drugs (Ireland)
- DADD stands for Dads Against Dangerous Dogs (Warrenton, OR)
- DADD stands for Drunks Against Drunk Driving (Myspace group)
- DADD stands for Dating Attention Deficit Disorder
- DADD stands for Dependant Affairs During Deployment
- DADD stands for Dial-a-Designated-Driver (Charlotte, NC)
- DADD stands for Dads Against Drunk Driving
- DADD stands for Dads Against Drug Dealers (activist group)
- DADD stands for Dealers Against Drunk Driving (automobile)
- DADD stands for Deck Aft Door Dogged
- DADD stands for Defenders Against Domestic Discrimination
- DADD stands for Data Archived & Distribution Device
- DADD stands for Dartington Against Detrimental Development (UK)
DADD