By 1930, the city, along with its sister city of Ludwigshafen, which had developed out of the old Mannheim Rheinschanze, had a population of 385,000.
Die Stadt zählte um 1930 gemeinsam mit der Schwesterstadt Ludwigshafen, die sich aus der alten Mannheimer Rheinschanze entwickelte, 385.000 Einwohner.