Ostbahn

Ostbahn (Eastern Railway) may refer to:
 * Austrian Eastern Railway (Ostbahn), a former railway company in the Austrian Empire and Austria-Hungary
 * Eastern Railway (Austria) (Austrian Ostbahn), a railway line in Austria, initially operated by Austrian Eastern Railway
 * Bavarian Eastern Railway Company (Bavarian Ostbahn), a former railway company in Bavaria, Germany
 * Prussian Eastern Railway (Prussian Ostbahn), a railway line in Prussia, part of the former German Empire
 * Württemberg Eastern Railway (Württemberg Ostbahn), a railway line in Württemberg, Germany
 * SC Ostbahn XI, an association football club based in Vienna, Austria
 * Ostbahn, German railway administration in occupied Poland (General Government) during World War II