Class 5

Class 5 may refer to:
 * A5-class customs vessels
 * Class 5 telephone switch
 * Class V (U.S. Army), ammunition of all types, and associated items
 * G-5-class motor torpedo boat
 * JKOY Class Sm5, Helsinki electric multiple unit
 * Sa'ar 5-class corvette
 * SCORE Class 5, off-road racing Baja Bug
 * S5-class submarine
 * TS Class 5, tram type used in Trondheim, Norway
 * U-5-class submarine (Austria-Hungary)
 * The fifth class in terms of hiking difficulty in the Yosemite Decimal System
 * Class 5 truck, US truck class for medium trucks, up to 19,500 pounds weight limit

Locomotives

 * Baltimore and Ohio Railroad EL-5 class
 * BR Standard Class 5, British 4-6-0 steam locomotive
 * BR Standard Class 5 73096
 * BR Standard Class 5 73156
 * Chicago, Burlington and Quincy O-5 class
 * G&SWR 5 Class
 * GCR Class 5
 * GCR Class 5A
 * Indian locomotive class WAG-5
 * Indian locomotive class WAP-5
 * Indian locomotive class WDG-5
 * NSB El 5, Norwegian electric locomotive
 * NSB Di 5, Norwegian diesel locomotive
 * KUR EC5 class
 * L&YR Class 5, British 2-4-2T steam locomotive
 * LB&SCR E5 class
 * LMS Stanier Class 5 4-6-0
 * LMS Stanier Class 5 4-6-0 4932
 * LMS Stanier Mogul
 * LNER Class K5
 * New Haven class I-5
 * NSB Class 5, Norwegian standard-gauge steam locomotive
 * NSB Class V, Norwegian narrow-gauge steam locomotive
 * Pennsylvania Railroad class A5s
 * Pennsylvania Railroad class G5
 * Pennsylvania Railroad class K5
 * Pennsylvania Railroad class L5
 * Pennsylvania Railroad class P5
 * Southern Pacific class AC-5
 * Southern Pacific class GS-5
 * SP&S Class L-5