The Emperor Ferdinand Northern Railway (German: Kaiser Ferdinands-Nordbahn, KFNB; Czech: Severní dráha císaře Ferdinanda, SDCF) was the name of a former railway company during the time of the Austrian Empire. Its main line was supposed to connect Vienna with salt mines in Bochnia near Kraków. Today, the term is still used to describe certain railway lines which were formerly operated by that company.
The Nordbahn, or Kaiser Ferdinands-Nordbahn, was Austria's first steam railway company and financed by Salomon Mayer von Rothschild (1774-1855). The first track was built between Floridsdorf and Deutsch Wagram in 1837. The extension to Vienna was built in 1838, and the track through Břeclav (Lundenburg) to Brünn in 1839. The first train from Vienna arrived to Břeclav on 6. June 1839. In 1841 it reached Přerov (Prerau) and Olomouc(Olmütz) and in 1842 Lipník nad Bečvou(Leipnik). Extension to Ostrava(Ostrau) and Bohumín(Oderberg) was finished in 1847. Nordbahn never directly reached Kraków(Krakau) or Bochnia. The first way to Kraków on rails via Bogumin (Oderberg), Kozle (Kosel), and Mysłowice (Myslowitz) was served by the Prussian lines of William's Railway (Wilhelmsbahn) and Upper Silesian Railway (Oberschlesische Bahn). The line from Mysłowice to Kraków was built by the Krákow and Upper Silesia Railway (Kolej Krakowsko-Górnośląska / Krakau-Oberschlesische Bahn). An intern Austrian rail route from Vienna to Kraków did not exist, before in 1856 the Austrian Eastern National Railway (k.k. Östliche Staatsbahn), descender of the Krákow and Upper Silesian, opened a branch form Trzebinia via Oświęcim to Dziedzice, where it met the Northern Railway.