Class 5

Class 5 may refer to:

• British Rail Class 05
• Class 5 telephone switch
• NSB Class 5, a standard-gauge steam locomotive of Norway
• NSB Class V, a narrow-gauge steam locomotive of Norway
• Class V (U.S. Army), Ammunition of all types (including chemical, radiological, and special weapons), bombs, explosives, mines, fuses, detonators, pyrotechnics, missiles, rockets, propellants, and other associated items
• NSB El 5, an electric locomotive of Norway
• NSB Di 5, a diesel locomotive of Norway
• TS Class 5, a tram of Trondheim, Norway
• The fifth class in terms of hiking difficulty in the Yosemite Decimal System