Sønderborg County ( da, Sønderborg Amt) is a former

province A province is almost always an administrative division within a country or state. The term derives from the ancient Roman ''provincia'', which was the major territorial and administrative unit of the Roman Empire's territorial possessions out ...

Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of Denmark , establish ...

, located on the island of

Als Amyotrophic lateral sclerosis (ALS), also known as motor neuron disease (MND) or Lou Gehrig's disease, is a neurodegenerative disease that results in the progressive loss of motor neurons that control voluntary muscles. ALS is the most comm ...

and the easternmost part of

Southern Jutland Southern Jutland ( da, Sønderjylland; German: Südjütland) is the name for the region south of the Kongeå in Jutland, Denmark and north of the Eider (river) in Schleswig-Holstein, Germany. The region north of the Kongeå is called da, Nør ...

. Sønderborg County was established in 1920 following the reunification of Denmark and South Jutland following the

Schleswig Plebiscites The Schleswig plebiscites were two plebiscites, organized according to section XII, articles 100 to 115 of the Treaty of Versailles of 28 June 1919, in order to determine the future border between Denmark and Germany through the former Duchy of ...

. It was dissolved in 1970 when it merged with three other counties to form

South Jutland County South Jutland County ( Danish: ''Sønderjyllands Amt'') is a former county ( Danish: ''amt'') on the south-central portion of the Jutland Peninsula in southern Denmark. The county was formed on 1 April 1970, comprising the former counties of A ...

. Sønderborg County corresponded geographically to the former

Prussian Prussia, , Old Prussian: ''Prūsa'' or ''Prūsija'' was a German state on the southeast coast of the Baltic Sea. It formed the German Empire under Prussian rule when it united the German states in 1871. It was ''de facto'' dissolved by an e ...

. After Denmark surrendered control over Schleswig to Prussia and the

Austrian Empire The Austrian Empire (german: link=no, Kaiserthum Oesterreich, modern spelling , ) was a Central- Eastern European multinational great power from 1804 to 1867, created by proclamation out of the realms of the Habsburgs. During its existence, ...

in 1864, the Schleswig island of Ærø was transferred from

Augustenborg County Augustenborg may refer to: * Augustenborg, Denmark * Augustenborg Municipality * Augustenborg, Malmö * Augustenburg Castle, eastern Karlsruhe, Germany * Augustenborg Palace Augustenborg Palace (or Augustenborg Castle; da, Augustenborg Slot, g ...

Svendborg County Svendborg County () is a former province in Denmark, located on the southern half of the island of Funen in central Denmark. Svendborg County was established in 1793 and abolished in 1970 when it merged with Odense County forming the new Funen Coun ...

and the island remained Danish. The rest of Augustenborg County was merged with Sønderborg and became Kreis Sonderburg. Sønderborg County and Aabenraa County merged in 1932, forming Aabenraa-Sønderborg County.

1970 administrative reform

Aabenraa-Sønderborg County was dissolved in the 1970 administrative reform and the former county became six new municipalities belonging to South Jutland County: * Augustenborg *

Broager Broager (; german: Broacker, South Jutlandic: Braue) is a town with a population of 3,238 (1 January 2022)Nordborg Nordborg (german: Norburg), is a town with a population of 5,709 (1 January 2022),Sundeved Sundeved is a peninsula on the east coast of the Jutland peninsula in south Denmark. It lies between Åbenrå Fjord and Als Fjord to the north, Alssund to the east and Flensborg Fjord to the south. The westernmost part of the city of Sønderborg ...

* Sydals *

Sønderborg (; german: Sonderburg ) is a Danish town in the Region of Southern Denmark. It is the main town and the administrative seat of Sønderborg Municipality (Kommune). The town has a population of 27,766 (1 January 2022),market town A market town is a settlement most common in Europe that obtained by custom or royal charter, in the Middle Ages, a market right, which allowed it to host a regular market; this distinguished it from a village or city. In Britain, small rural ...

s (''købstæder'') of ... nsert list->

List of former
hundred 100 or one hundred (Roman numeral: C) is the natural number following 99 and preceding 101. In medieval contexts, it may be described as the short hundred or five score in order to differentiate the English and Germanic use of "hundred" to des ...
s ()

*Als Nørre Herred *Als Sønder Herred *Nybøl Herred

1970 administrative reform

List of former hundred 100 or one hundred (Roman numeral: C) is the natural number following 99 and preceding 101. In medieval contexts, it may be described as the short hundred or five score in order to differentiate the English and Germanic use of "hundred" to des ...s ()

See also

List of former
hundred 100 or one hundred (Roman numeral: C) is the natural number following 99 and preceding 101. In medieval contexts, it may be described as the short hundred or five score in order to differentiate the English and Germanic use of "hundred" to des ...
s ()