Class 01

Class 01 may refer to:


 * British Rail Class 01, a class of post-war British 0-4-0 diesel locomotive designed for use on tight curves and limited clearances
 * British Rail Class 01/5, encompasses a variety of privately owned shunting locomotives
 * DRG Class 01, a class of German standard steam locomotive designed between the wars for express train services
 * DRG Class 01.10, a later, more powerful version of the DRG Class 01 above first delivered in 1939
 * Class 01, in the electrical Appliance classes