The railway vehicle classes covered by this list of DRG locomotives and railbuses belonged to the Deutsche Reichsbahn-Gesellschaft or DRG (1924–37) and its successor, the Deutsche Reichsbahn or DRB (post 1937).
German Imperial Railway Company) was formed under the terms of the Dawes Plan from the Deutsche Reichseisenbahnen (lit.
The tables are generally organized in accordance with the DRG's numbering schemes for the various types of vehicles.
The DB and the DR later introduced newly built classes into the numbering plans and also reclassified some vehicles following rebuilding.
The locomotives taken over from private railways as well as the classes given to foreign machines immediately before and during the Second World War are covered for express passenger and passenger tender locomotives only so far.