- DJJ stands for Department of Juvenile Justice
- DJJ stands for Division of Juvenile Justice
- DJJ stands for David J. Joseph Company
- DJJ stands for Deutsche Justiz-Jugend (German: German Youth Justice)
- DJJ stands for Duodenojejunal Junction (anatomy)
- DJJ stands for De Jonge Journalist (Dutch: The Young Journalist; online newspaper; Netherlands)
DJJ