V21 may refer to:
- Autovía V-21, a road in Spain
- Fokker V.21, a German prototype fighter aircraft
- ITU-T V.21, a modem standard
- Tamsui metro station, in New Taipei, Taiwan
- Venture 21, an American sailboat
- V21, constitutional states in development, in the ICD-9 V codes
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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