| Marchegger Ostbahn | |
| Image Alt: | Route map of the Marchegger Ostbahn |
| Linelength Km: | 41.6 |
| Electrification: | (Wien Stadlau–Marchegg) |
| Map State: | uncollapsed |
The Marchegger Ostbahn is a railway line in Austria and Slovakia. It runs 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 .
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 .
Beginning in 2016, ÖBB has undertaken to double-track and electrify the line. Double-track and electrification opened between and with the December 2018 timetable change.[1] Electrification was extended to Marchegg in December 2022; work on double-tracking continues.[2] 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.[3] The project to double-track the section is under environmental review.[4]
The of the Vienna S-Bahn operates half-hourly between and Wien Aspern Nord. Some Regionalzug services operate between Wien Hauptbahnhof and Marchegg, while Regional-Express trains operate through between Wien Hauptbahnhof and .[5]