Class 21 or 21 Class may refer to:
- Atlantic 21-class lifeboat
- Belgian Railways Class 21, Belgian electric locomotive
- British Rail Class 21 (NBL), British diesel-electric locomotive
- British Rail Class 21 (MaK), various locomotives used by Eurotunnel
- GS&WR Class 21
- Hormuz 21-class landing ship
- L&YR Class 21, British 0-4-0ST steam locomotive
- NSB Class 21, Norwegian 2-6-0 steam locomotive
- O 21-class submarine
- P21-class patrol vessel
- PKP class ET21
- South African Class 21 2-10-4, South African steam locomotive
See also
Topics referred to by the same term
This disambiguation page lists articles associated with the title Class 21.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: