Imperial Royal Privileged Austrian State Railway Company

The Imperial Royal Privileged Austrian State Railway Company (German: k. k. privilegierte österreichische Staatseisenbahn-Gesellschaft), from 1 January 1883 the Privileged Austro-Hungarian State Railway Company (privilegierte österreichisch-ungarische Staatseisenbahn-Gesellschaft) was a private railway company in the Austro-Hungarian Empire. Its title was abbreviated to State Railway Company (Staats-Eisenbahn-Gesellschaft) or StEG.

The StEG was founded on 17 October 1854 primarily with French capital and on 1 January 1855 bought the Northern State Railway and the Austrian Southeastern Railway from the Austrian state, Hence the unusual name of the new company. By procuring the Vienna–Raab railway on 13 February 1855 and the Brünn-Rossitz railway on 1 January 1879 and building new lines the StEG network within the Austrian part of the empire had grown by 1890 to around 1,350 km; in addition there were 1,500 km of railway in Hungary.

On 15 October 1909 the StEG was nationalised and, with it became a part of the Imperial Royal Austrian State Railways or kkStB. The routes on Hungarian territory had already been transferred to the Hungarian State Railway in 1891. That included the Bruck–Nickelsdorf and Marchegg–border sections, that did not come into the Federal Railways of Austria's (BBÖ) possession until 1920.

In the territories which form the current Austria, the StEG network covered a total of about 255 km. Its start point was the state railway station in Vienna, later the Ostbahnhof, which is today part of the Südbahnhof. One main line headed south towards Budapest, passing through Götzendorf to Bruck an der Leitha (1846), where until 1920 the border with Hungary lay, and on to the present-day border station of Nickelsdorf (1855). From 1884 the line branched in Götzendorf to Klein Schwechat on the one hand and Mannersdorf on the other. In 1886/87 a line was built from Bruck via Bad Deutsch Altenburg to Hainburg an der Donau.

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