Class 7

Class 7 may refer to:
 * Baltimore and Ohio P-7
 * British Rail Class 07
 * BR Standard Class 7
 * BR Standard Class 7 70000 Britannia
 * BR Standard Class 7 70048 The Territorial Army 1908–1958
 * GWR 7 Class
 * GWR 7 (Armstrong) Class
 * Ha-7-class submarine
 * HAZMAT Class 7 Radioactive substances
 * I-7-class submarine
 * Indian locomotive class WAG-7
 * Indian locomotive class WAP-7
 * Indian locomotive class WDM-7
 * L&YR Class 7
 * LMS Class 7F 0-8-0
 * LSWR M7 class
 * LSWR T7 class
 * MGWR Class 7
 * Milwaukee Road class F7
 * NSB Class 7, a standard-gauge steam locomotive of Norway
 * NSB Class VII, a narrow-gauge steam locomotive of Norway
 * Class VII (U.S. Army), Major items: A final combination of end products which is ready for its intended use: (principal item) for example, launchers, tanks, mobile machine shops, vehicles
 * NSB El 7, an electric locomotive of Norway
 * NSB Di 7, a diesel locomotive of Norway
 * Southern Pacific class AC-7
 * Surface of class VII, non-algebraic complex surface
 * TS Class 7, a tram of Trondheim, Norway
 * Class 7 truck, a US truck class for heavy trucks up to 33,000 pounds weight limit
 * TS Class 7
 * U-7 class submarine (Austria-Hungary)
 * VR Class Dm7
 * W-7-class minesweeper