Z-class may refer to:
- SR Z Class, a class of steam locomotive built by the Southern Railway in the United Kingdom
- WAGR Z class, a class of diesel-mechanical locomotives of the Western Australian Government Railways
- W and Z-class destroyer, a class of destroyers of the Royal Navy launched in 1943–1944
- Z-Class Melbourne Tram, a single bogie electric tram used in Australia
This disambiguation page lists articles associated with the title Z-class.
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