Y class
- Economy class
- GNoSR Classes X and Y
- Model Y (disambiguation)
- NCC Class Y
- NER Class Y
- SNCF Class Y 7100
- SNCF Class Y 7400
- SNCF Class Y 8000
- SNCF Class Y 8400
- SNCF Class Y 9000
- South Australian Railways Y class
- Tasmanian Government Railways Y class
- Victorian Railways Y class
- Victorian Railways Y class (diesel)
- WAGR Y class
- Y (disambiguation)
- Y dwarf
- Y-class Melbourne tram
- Y-class lifeboat
- Y1-class Melbourne tram