D class may refer to:

Ships D-class cruiser (Germany), a pair of proposed cruisers D-class cruiser (United Kingdom), British light cruisers that served during World War II D-class lifeboat, British lifeboats D-class destroyer (disambiguation), several classes of ships British D-class submarine United States D-class submarine D-class ferry, roll-on/roll-off ferries operated by DFDS Seaways

Rail vehicles Australia Commonwealth Railways D class, 4-4-0 steam locomotives MRWA D class, 2-8-0 type steam locomotives South Australian Railways D class, 4-4-0 steam locomotives Victorian Railways D class (1876), 4-4-0 steam locomotive Victorian Railways D class (1887), 4-4-0 steam locomotive Victorian Railways Dd class, 4-6-0 steam locomotive WAGR D class, 4-6-4T tank locomotive WAGR D class (1884), 0-4-0ST tank locomotives WAGR D class (diesel), diesel locomotives D-class Melbourne tram D-class Melbourne tram (1914) D-class Sydney tram

India DHR D Class, 0-4-0+0-4-0 Garratt-type articulated steam locomotives

New Zealand NZR D class (1874), 33 2-4-0T tank locomotives NZR D class (1929), 1 experimental 0-4-0T locomotives

Philippines Manila Railway D class, 4-6-0 steam locomotives

United Kingdom Metropolitan Railway D Class, tank engines NBR D class 0-6-0, steam locomotives NBR D class 0-6-0T, tank locomotives LNWR Class D, 0-8-0 steam locomotives SECR D class, 4-4-0 tender locomotives

Other uses D-class blimp, United States Navy blimps D-segment, a European vehicle size class D-class personnel, disposable human test subjects in the fictional SCP Foundation

See also

Class D (disambiguation) D type (disambiguation)

Delta class (disambiguation)