Flensburg (flĕnsˈbŏrkh) [key], city (1994 pop. 87,990), Schleswig-Holstein, N Germany, on the Flensburg Fjord, an arm of the Baltic Sea, at the Danish border. It is Germany's northernmost city. An active Baltic port and commercial center, it has shipyards, metal works, rum distilleries, smoked-fish plants, and paper factories. Flensburg was chartered in 1284 and acquired commercial importance in the 16th cent. In 1867 it passed from the Danish crown to Prussia. In a 1920 plebiscite, the city voted to remain a part of Germany. During World War II it was heavily bombed and lost its large merchant fleet. There is a municipal museum in the city.