Class 23 may refer to:
23-class airship Belgian Railways Class 23, electric locomotive British Rail Class 23 "Baby Deltic", diesel-electric locomotive built by English Electric with Napier Deltic engines G&SWR 23 Class, 0-4-2 steam locomotive GNR Class J23, 0-6-0T steam locomotive L&YR Class 23, 0-6-0 steam locomotive operated by the Lancashire and Yorkshire Railway German express train, tender locomotives with a 2-6-2 wheel arrangement operated by the DRG, DB and DR: The DRG's pre-war, standard, steam locomotive (Einheitslokomotive): DRG Class 23 The DB's post-war (Neubaulokomotive): DB Class 23 The DR's post-war Neubaulokomotive in East Germany: DR Class 23.10 R23X-class airship Soviet locomotive class OR23 Südbahn Class 23 (old)
See also Type 23 (disambiguation)