In the Babylon 5 universe, a project launched by the Earth Alliance after the Earth-Minbari War, to construct a space station in neutral territory with the goal of preventing another war by providing a place where humans and aliens could work out their differences.

The first three Babylon stations were sabotaged during construction. Babylon 4 vanished shortly after its completion. The last of these stations, which went online in 2257, was Babylon 5.