The Hamburg-Altona link line is a railway line in Hamburg, Germany. Nowadays, it connects the lines from the north and northwest of Hamburg and Altona station with Hamburg Hauptbahnhof and the lines to the southwest, south and east. Initially designed as a freight line only, it is now one of the busiest lines in Germany. It includes the suburban tracks of the Hamburg Stadtbahn, originally the core of the Hamburg S-Bahn.

Hamburg-Altona is a railway station in Hamburg, Germany, situated to the west of the city's main station, in the district which bears its name.