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 Metropolitan Railway B Class, a British steam locomotive 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 CIÉ 101 Class, an Irish diesel locomotive CIÉ 113 Class, an Irish diesel locomotive LCDR B class, a British steam locomotive MRWA B class, an Australian steam locomotive South Australian Railways B class, an Australian steam locomotive Tasmanian Government Railways B class, an Australian steam locomotive Victorian Railways B class (1861), 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 WikiProject#WikiProjects and assessments of article importance and quality, on Wikipedia
See also Class B (disambiguation) B type (disambiguation) B series (disambiguation)