Duchy of Berg

County (Duchy) of Berg
Grafschaft (Herzogtum) Berg (German)
Graafschap (Hertogdom) Berg (Dutch)
1101–1815
Coat of arms of Berg
Coat of arms of Berg
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
Map of the Lower Rhenish–Westphalian Circle around 1560, Duchy of Berg highlighted in red
StatusDuchy
Capital
Common languagesGerman
GovernmentAbsolute monarchy
Duke of Berg 
• 1360–1380
Wilhelm II (first duke)
• 1809-1813
Napoléon Louis Bonaparte (Grand Duke)
Historical eraMiddle 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
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. It was a member state of the Holy Roman Empire.

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