H class or Class H may refer to:

Railway locomotives

• Barry Railway Class H, 0-8-2T tank locomotives
• NZR H class, steam locomotives used by the New Zealand Railways Department
• Metropolitan Railway H Class, 4-4-4T steam locomotives
• Palestine Railways H class, steam locomotives
• SECR H class, 0-4-4T locomotives designed by Harry Wainwright
• Taff Vale Railway H class, 3 0-6-0T steam tank locomotives
• Victorian Railways H class, 4-8-4 steam locomotives used in Australia
• Victorian Railways H class (diesel), diesel locomotives
• WAGR H class, steam locomotives
• WAGR H class (diesel), diesel electric locomotives

Trams

• H type Adelaide tram
• Sydney H-Class Tram

Ship types

• H-class destroyer, British destroyer class which served during World War II
• H-class battleship proposals, multiple planned, but cancelled, German battleship classes during World War II
• H-class lifeboat, RNLI hovercraft lifeboats
• H-class submarine (disambiguation), multiple classes

Other uses

• H-class blimp, observation airships built for the U.S. Navy
• Class H, a class of electronic amplifiers

See also

• H (disambiguation)