County of Rantzau

Imperial County of Rantzau
Reichsgrafschaft Rantzau
1650–1864
Coat of arms
StatusImperial county
CapitalBarmstedt
History 
 Established
1650
 Acquired by Denmark-Norway
9 April 1726
 Mediatised to Prussia
1864
Preceded by
Succeeded by
Holstein-Gottorp
Kingdom of Prussia

The Imperial County of Rantzau (German: Reichsgrafschaft Rantzau) was an immediate state of the Holy Roman Empire which lasted from 1650 to 1864. Its territory is more or less congruent with the present Amt Rantzau.