The Gänserndorf–Marchegg railway line is a single-tracked electrified railway line that runs 18.2 kilometres (11.3 mi) from Gänserndorf to Marchegg, in Austria.

The Gänserndorf–Marchegg railway line begins at Gänserndorf, where it splits off from the North railway line, which runs between Wien Praterstern and Břeclav.

The line runs southeast toward the border with Slovakia, with a single intermediate stop at Oberweiden.

At the same time, the Hungarian Central Railway [hu] completed a connecting line [sk] from Marchegg to Pressburg (now Bratislava).

[3] The S1 of the Vienna S-Bahn operates hourly between Gänserndorf and Marchegg.