County of Regenstein

County of Regenstein Grafschaft Regenstein
1162–1599
Coat of arms
Status	County
Capital	Derenburg
Historical era	Middle Ages
• Partitioned from     County of Blankenburg	1162
• County of Regenstein-Heimburg	1366
• Personal union with Blankenburg	1368
• Joined Lower Saxon Circle	1500
• Fell to Bishopric of Halberstadt	1599 1599
• Acquired by Brandenburg-Prussia	1648
Preceded by Succeeded by County of Blankenburg Bishopric of Halberstadt

The County of Regenstein was a mediaeval statelet of the Holy Roman Empire. It was ruled by the Saxon comital House of Regenstein, named after their residence at Regenstein Castle near Blankenburg north of the Harz mountain range.