Preußische Staatseisenbahnen

The term Prussian state railways (German: Preußische Staatseisenbahnen) encompasses those railway organisations that were owned or managed by the State of Prussia. The words "state railways" are not capitalized because Prussia did not have an independent railway administration; rather the individual railway organisations were under the control of the Ministry for Trade and Commerce or its later offshoot, the Ministry for Public Works.

The official name of the Prussian rail network was Königlich Preußische Staatseisenbahnen (K.P.St.E., "Royal Prussian State Railways") until 1896, Königlich Preußische und Großherzoglich Hessische Staatseisenbahn (K.P.u.G.H.St.E., "Royal Prussian and Grand-Ducal Hessian State Railways") until the end of the First World War, and Preußische Staatsbahn (P.St.B., "Prussian State Railway") until its nationalization in 1920. A common mistake is the use of the abbreviation K.P.E.V. in supposed reference to a mythical "Royal Prussian Railway Administration" (Königlich Preußischen Eisenbahn-Verwaltung). No such entity ever existed and Prussian railway cars acquired the K.P.E.V. logo apparently through an error originating in their Cologne division.

The first Prussian railways were private concerns, beginning with the Berlin-Potsdam Railway in 1838 and which was therefore known as the "Stammbahn" (roughly translates as 'original line'). The state of Prussia first financed railways around 1850. These were the Royal Westphalian Railway Company (Königlich-Westfälische Eisenbahn-Gesellschaft) and the Prussian Eastern Railway or Prussian Ostbahn (Preußische Ostbahn). In 1875 they funded two more important new railways: the Prussian Northern Railway or Prussian Nordbahn (Preußsische Nordbahn) and the Marienfelde–Zossen–Jüterbog Military Railway.

After the Austro-Prussian War of 1866, various private, commercially oriented lines were brought under Prussian control through annexation, outright purchase or the provision of financial support depending on their situation. Between 1880 and 1889 most of the private lines were nationalised thanks to Prussia's strong financial situation making it the biggest company in Germany in 1907.

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