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Marchegger Ostbahn
Map showing the Marchegger Ostbahn within Austria
Technical
Line length	41.6 km (25.8 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	15 kV  16.7 Hz AC (Wien Stadlau–Marchegg)
Route map Legend km Laaer Ostbahn to Vienna Line U2 0.0 Wien Stadlau Fbf 0.7 Wien Erzherzog-Karl-Straße Laaer Ostbahn to Laa an der Thaya 2.0 Wien Hirschstetten 3.1 Hausfeldstraße 4.5 Wien Aspern Nord Seestadt Line U2 to Breitenlee yard [de] 10.3 Raasdorf 14.6 Glinzendorf Rußbach [de] Siebenbrunn–Engelhartstetten line [de] to Engelhartstetten 19.5 Siebenbrunn-Leopoldsdorf 22.7 Untersiebenbrunn 27.1 Schönfeld-Lassee 32.5 Breitensee NÖ Gänserndorf–Marchegg line to Gänserndorf 35.6 Marchegg 37.9 Austria Slovakia border Bratislava–Břeclav line [sk] to Břeclav 41.6 Devínska Nová Ves [sk] (Theben-Neudorf) Bratislava–Marchegg line [sk] to Bratislava Source[1] This diagram: view talk edit

The Marchegger Ostbahn (lit. 'Marchegg Eastern railway line') is a railway line in Austria and Slovakia. It runs 41.6 kilometres (25.8 mi) from the Donaustadt district of Vienna to Marchegg, where it crosses the Morava river and enters Slovakia. At Devínska Nová Ves, it continues as the Bratislava–Marchegg railway line [sk].

The line splits from the Laaer Ostbahn near Wien Stadlau railway station, in the Donaustadt district of Vienna. It runs east from there to Marchegg. From Marchegg, the line crosses the Morava river and enters Slovakia. At Devínska Nová Ves, it continues as the Bratislava–Marchegg railway line [sk].^[1]

Beginning in 2016, ÖBB has undertaken to double-track and electrify the line. Double-track and electrification opened between Wien Erzherzog-Karl-Straße and Wien Aspern Nord with the December 2018 timetable change.^[2] Electrification was extended to Marchegg in December 2022; work on double-tracking continues.^[3] Works to electrify the section from Marchegg to Devínska Nová Ves are going to start in March 2024 with the opening scheduled for December 2024.^[4] The project to double-track the section is under environmental review.^[5]

The S80 of the Vienna S-Bahn operates half-hourly between Wien Hütteldorf and Wien Aspern Nord. Some Regionalzug services operate between Wien Hauptbahnhof and Marchegg, while Regional-Express trains operate through between Wien Hauptbahnhof and Bratislava main.^[6]

• Media related to Marchegger Ostbahn at Wikimedia Commons