Bremen, officially the City Municipality of Bremen, is the capital of the German state Free Hanseatic City of Bremen, a two-city-state consisting of the cities of Bremen and Bremerhaven. With about 570,000 inhabitants, the Hanseatic city is the 11th largest city of Germany and the second largest city in Northern Germany after Hamburg.
Bremen is the largest city on the River Weser, the longest river flowing entirely in Germany, lying some 60 km upstream from its mouth into the North Sea, and is surrounded by the state of Lower Saxony. A commercial and industrial city, Bremen is, together with Oldenburg and Bremerhaven, part of the Bremen/Oldenburg Metropolitan Region, with 2.5 million people. Bremen is contiguous with the Lower Saxon towns of Delmenhorst, Stuhr, Achim, Weyhe, Schwanewede and Lilienthal. There is an exclave of Bremen in Bremerhaven, the "Citybremian Overseas Port Area Bremerhaven". Bremen is the fourth largest city in the Low German dialect area after Hamburg, Dortmund and Essen.
Bremen's port, together with the port of Bremerhaven at the mouth of the Weser, is the second largest port in Germany after the Port of Hamburg.