This list contains the locomotives and railbuses of the Grand Duchy of Oldenburg State Railways (Großherzoglich Oldenburgische Eisenbahn orGOE).
The names chosen for locomotives were mainly those of German regions, rivers and towns in the Grand Duchy and the rest of Germany.
The names of the little tank engines were especially original, intending to describe the way they moved, such as HIN, HER, FLINK, FLOTT (literally: Here, There, Fast and Agile).
Only in the run up to DRG renumbering were Prussian class designations used in order to simplify the naming and grouping of Oldenburg locomotives.
During the first three decades of its existence, the GOE managed with a locomotive type for all railway services that, in constantly upgraded forms, was re-ordered repeatedly.