Duchy of Berg

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County (Duchy) of Berg Grafschaft (Herzogtum) Berg (German) Graafschap (Hertogdom) Berg (Dutch)
1101–1815
Left: Arms of Bergins (from around 1225), who ruled the Duchy of Berg last Right: Coat of arms of the Duke of Berg
Map of the Lower Rhenish–Westphalian Circle around 1560, Duchy of Berg highlighted in red
Status	Duchy
Capital	Schloss Burg (1101–1280) Düsseldorf (1280–1815)
Common languages	German
Government	Absolute monarchy
Duke of Berg
• 1360–1380	Wilhelm II (first duke)
• 1809-1813	Napoléon Louis Bonaparte (Grand Duke)
Historical era	Middle Ages
• Emergence from Lotharingia	1101
• Split with County of Mark	1160
• United with County of Jülich	1348
• United with County of Mark and Duchy of Cleves	→ 1521
• United with Palatinate-Neuburg and the Electorate of the Palatinate	1609 and 1690
• Awarded to Prussia	9 June 1815
Preceded by Succeeded by Lotharingia Kingdom of Prussia

Berg was a state—originally a county, later a duchy—in the Rhineland of Germany. Its capital was Düsseldorf. It existed as a distinct political entity from the early 12th to the 19th centuries.

The name of the county lives on in the modern geographic term Bergisches Land, often misunderstood as bergiges Land (hilly country).