B class may refer to:

Ships

• B-class corvette of the Turkish Navy
• B-class destroyer, launched in 1930 for the British Royal Navy
• B-class destroyer (1913), British torpedo boat destroyers
• B-class lifeboat, British lifeboats
• B-class submarine (disambiguation), several types

Rail transport

• B-class Melbourne tram, an Australian tram
• DHR B Class, built for the Darjeeling Himalayan Railway in India
• NBR B class, a British steam locomotive
• NZR B class (1874), a steam locomotive of the New Zealand Railways Department
• NZR B class (1899), a steam locomotive of the New Zealand Railways Department
• CIE 101 Class, an Irish diesel locomotive
• CIE 113 Class, an Irish diesel locomotive
• LCDR B class, a British steam locomotive
• MRWA B class, a British steam locomotive
• Victorian Railways B class, an Australian steam locomotive
• Victorian Railways B class (diesel), an Australian diesel locomotive
• WAGR B class, an Australian steam locomotive
• WAGR B class (diesel), an Australian diesel locomotive

Other uses

• B-class blimp, airships operated by the United States Navy
• B-segment, a European vehicle size class
• Mercedes-Benz B-Class, a subcompact executive car

See also

• Class B (disambiguation)
• B type (disambiguation)
• B series (disambiguation)