The North railway line (German: Nordbahn) is a two-track, electrified railway line that runs 83.1 kilometres (51.6 mi) from Vienna, Austria to Břeclav, Czech Republic.

The North railway line begins at Wien Praterstern, in the Leopoldstadt district of Vienna.

It extends north from the Verbindungsbahn, the primary trunk line of the Vienna S-Bahn.

Regional-Express trains operate hourly between Payerbach-Reichenau or Wiener Neustadt and Břeclav.

Various long-distance Railjet, EuroCity, EuroNight, and Nightjet services use the route as well, but do not make local stops between Wien Hauptbahnhof and Břeclav.