Y class or class Y may refer to:

• South Australian Railways Y class, a steam locomotive class built in South Australia
• Victorian Railways Y class, an example of the new policy of standard design principles being adopted by the railways
• GNoSR Classes X and Y, two similar classes of 0-4-2T steam locomotives
• NCC Class Y, a class of 0-6-0T steam locomotive
• NER Class Y, a 4-6-2T steam locomotive
• SNCF Class Y 7100, a class of small diesel shunters
• SNCF Class Y 7400, a class of small diesel shunters
• SNCF Class Y 8000, a class of diesel shunter built between 1977 and 1990
• SNCF Class Y 8400, a class of small diesel shunters
• SNCF Class Y 9000, the new designation for modernized and re-engined Y7100 and Y7400 shunters
• Tasmanian Government Railways Y class, a type of Bo-Bo diesel electric locomotive
• Victorian Railways Y class (diesel), a small branch line and shunting unit
• WAGR Y class, a diesel electric locomotive introduced in 1953
• Y-class Melbourne tram
• Y1-class Melbourne tram

• Y-class lifeboat, a class of small inflatable boat operated by the RNLI of the United Kingdom and Ireland
• Spectral class Y, spectral classification of a substellar object
• Economy class (travel class code used by airlines: "Y")
• Class Y, a capacitor type

• Y (disambiguation)
• Model Y (disambiguation)

This disambiguation page lists articles associated with the title Y class.
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