Sønderborg County

[1] After Denmark surrendered control over Schleswig to Prussia and the Austrian Empire in 1864, the Schleswig island of Ærø was transferred from Augustenborg County to Svendborg County and the island remained Danish.

The rest of Augustenborg County was merged with Sønderborg and became Kreis Sonderburg.

Sønderborg County was reestablished in 1920 following the reunification of Denmark and South Jutland following the Schleswig Plebiscites.

Sønderborg County corresponded geographically to the former Prussian Kreis Sonderburg [de].

Aabenraa-Sønderborg County was dissolved in the 1970 administrative reform and the former county became six new municipalities belonging to South Jutland County: The country is consisted of the following hundreds: This article incorporates material from the corresponding article on the Danish Wikipedia, accessed 30 April 2007.

Sønderborg County. The entire province became part of South Jutland County in 1970.