Jutland peninsula is made up of the German Bundesland of Schleswig-Holstein. Schleswig-Holstein has two parts: the former duchies of Schleswig (Danish fief) and Holstein (German fief), both of which have passed back and forth between Danish and German rulers several times. The last adjustment of the Danish–German border followed the Schleswig Plebiscites in 1920 and resulted in Denmark's regaining Northern Schleswig ( or more commonly today: "Sønderjylland"). The historical southern border of Jutland are areas south of Kiel, Husum and Rendsburg, but the river Eider was the border between the former duchies of Schleswig and Holstein, as well as the historical
East Jutland metropolitan area 2016, Viborg municipality became a part of Business Region Aarhus. Contributing with a population of 95,776 and an area of 1,409 km. The core area around Aarhus is the most populated area in East Jutland, and that area is much smaller in km² - 6,182 km² - (2386 sq. mi) and with a population of more than one million. The figures below are for the core area centered on Aarhus and most populous area in the East Jutland metropolitan area as of 1 January 2016. The figures below are for the whole East Jutland metropolitan area as of 1 January