Dy
- 1,4-Dioxane
- 808 Mafia
- Alyemda
- D. Y. Patil college of Engineering and Technology, Kolhapur
- DY (rapper)
- DY Eridani
- DY Patil Stadium
- DY Persei
- DY Persei variable
- DY postcode area
- Daddy Yankee
- Dee Why
- Deputy (disambiguation)
- Diana, Princess of Wales
- Die (disambiguation)
- Dy (surname)
- Dye (disambiguation)
- Dysprosium
- International vehicle registration code
- Norwegian Air Shuttle
- YD (disambiguation)