The Hamburg-Amerikanische Packetfahrt-Actien-Gesellschaft (HAPAG), known in English as the Hamburg America Line, was a transatlantic shipping enterprise established in Hamburg, in 1847. Among those involved in its development were prominent citizens such as Albert Ballin, Adolph Godeffroy, Ferdinand Laeisz, Carl Woermann, August Bolten, and others, and its main financial backers were Berenberg Bank and H. J. Merck & Co. It soon developed into the largest German, and at times the world's largest, shipping company, serving the market created by German immigration to the United States and later, immigration from Eastern Europe. On 1 September 1970, after 123 years of independent existence, HAPAG merged with the Bremen-based North German Lloyd to form Hapag-Lloyd AG.

Hamburg, officially the Free and Hanseatic City of Hamburg, is the second-largest city in Germany, after Berlin, and 8th-largest in the European Union, with a population of over 1.9 million. The Hamburg Metropolitan Region has a population of over 5.1 million and is the ninth-biggest metropolitan region by GDP in the European Union.