Memmingen is a town in Swabia, Bavaria, Germany. It is the economic, educational and administrative centre of the Danube-Iller region. To the west the town is flanked by the Iller, the river that marks the Baden-Württemberg border. To the north, east and south the town is surrounded by the district of Unterallgäu. With about 42,000 inhabitants, Memmingen is the 5th biggest town in the administrative region of Swabia. The origins of the town go back to the Roman Empire.