- YDG stands for Young Democrats of Georgia (Atlanta, GA)
- YDG stands for District Degaussing Vessel (US Navy)
- YDG stands for Yeni Demokratik Genclik (Turkish: New Democratic Youth)
- YDG stands for Young Designers Guild (Philippines)
- YDG stands for Youth Development Group (UK)
- YDG stands for York Design Group (Missouri and California)
- YDG stands for Yearling Daily Gain (animal science)
YDG