Regierungsbezirk Allenstein was a Regierungsbezirk

Regierungsbezirk

In Germany, a Government District, in German: Regierungsbezirk – is a subdivision of certain federal states .They are above the Kreise, Landkreise, and kreisfreie Städte...

, or government region, of the Prussian

Kingdom of Prussia

The Kingdom of Prussia was a German kingdom from 1701 to 1918. Until the defeat of Germany in World War I, it comprised almost two-thirds of the area of the German Empire...

 province of East Prussia

Province of East Prussia

The Province of East Prussia was a province of Prussia from 1773–1829 and 1878-1945. Composed of the historical region East Prussia, the province's capital was Königsberg ....

 from 1905 until 1945. The regional capital was Allenstein

Olsztyn

Olsztyn is a city in northeastern Poland, on the Łyna River. Olsztyn has been the capital of the Warmian-Masurian Voivodeship since 1999. It was previously in the Olsztyn Voivodeship...

 (present-day Olsztyn). The territory today is part of the Polish Warmian-Masurian Voivodeship

Warmian-Masurian Voivodeship

Warmian-Masurian Voivodeship, or Warmia-Masuria Province , is a voivodeship in northeastern Poland. Its capital and largest city is Olsztyn...

.

History

The government region was created on 1 November 1905 as the third East Prussian Regierungsbezirk out of the southern districts of the two original administrative regions Gumbinnen

Gumbinnen (region)

Regierungsbezirk Gumbinnen was a Regierungsbezirk, or government region, of the Prussian province of East Prussia from 1815 until 1945. The regional capital was Gumbinnen .-History:...

 and Königsberg

Königsberg (region)

Regierungsbezirk Königsberg was a Regierungsbezirk, or government region, of the Prussian province of East Prussia from 1815 until 1945. The regional capital was Königsberg .-History:...

, which had been established in 1815. It comprised the south of the former Duchy of Prussia; the lands of the Allenstein

Olsztyn

Olsztyn is a city in northeastern Poland, on the Łyna River. Olsztyn has been the capital of the Warmian-Masurian Voivodeship since 1999. It was previously in the Olsztyn Voivodeship...

 and Rößel

Reszel

Reszel is a town in Poland in the Warmian-Masurian Voivodeship. The population is about 5,700.Reszel was originally a settlement built by the Bartian tribe of Old Prussians and conquered by the Teutonic Knights in 1241. The native Prussians later recaptured the settlement and held it for five...

 districts had belonged to the Prince-Bishopric of Warmia, annexed by Prussia in 1772.

In 1945 following World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, Regierungsbezirk Allenstein was dissolved when East Prussia was partitioned between the Republic of Poland

People's Republic of Poland

The People's Republic of Poland was the official name of Poland from 1952 to 1990. Although the Soviet Union took control of the country immediately after the liberation from Nazi Germany in 1944, the name of the state was not changed until eight years later...

 and the Soviet Union

Soviet Union

The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 (Kaliningrad Oblast) according to the resolutions at the Potsdam Conference

Potsdam Conference

The Potsdam Conference was held at Cecilienhof, the home of Crown Prince Wilhelm Hohenzollern, in Potsdam, occupied Germany, from 16 July to 2 August 1945. Participants were the Soviet Union, the United Kingdom, and the United States...

.

Landkreise

1. Allenstein
2. Johannisburg (Pisz
   Pisz
   Pisz is a town in the Warmian-Masurian Voivodeship in Poland, with a population of 19,328 in 2004. It is the seat of Pisz County. Pisz is located at the junction of Lake Roś and the Pisa River.- Etymology :...
   
    today, Jańsbork between 1945-1946)
3. Lötzen (Giżycko
   Gizycko
   Giżycko is a town in northeastern Poland with 29,796 inhabitants . It is situated in the Warmian-Masurian Voivodeship , having previously been in the Suwałki Voivodeship . It is the seat of Giżycko County.-History:...
   
    today, Lec between 1945-1946)
4. Lyck (Ełk today)
5. Neidenburg (Nidzica
   Nidzica
   Nidzica is a town in the Warmian-Masurian Voivodeship in Poland, between Olsztyn and Mława. It has a population of 14,798 . It is the capital of Nidzica County.-History:...
   
    today, Nibork between 1945-1946)
6. Ortelsburg (Szczytno
   Szczytno
   Szczytno is a town in north-eastern Poland with 27,970 inhabitants . Previously part of the Olsztyn Voivodeship, Szczytno was assigned to the Warmian-Masurian Voivodeship in 1999. It is the seat of Szczytno County....
   
    today)
7. Osterode (Ostróda
   Ostróda
   Ostróda is a town in Ostróda County in the Warmian-Masurian Voivodeship in Poland, with 33,603 inhabitants as of January 1, 2005. It lies in the Masurian Lake District and is a growing tourist site owing to its relaxing natural surroundings.-History:...
   
    today)
8. Rößel (Reszel
   Reszel
   Reszel is a town in Poland in the Warmian-Masurian Voivodeship. The population is about 5,700.Reszel was originally a settlement built by the Bartian tribe of Old Prussians and conquered by the Teutonic Knights in 1241. The native Prussians later recaptured the settlement and held it for five...
   
    today) (administrative seat: Bischofsburg
   Biskupiec
   Biskupiec is a town in the Warmian-Masurian Voivodeship in Poland. It is located in Olsztyn County and has a predominantly Catholic population of approximately 11,400...
   
   )
9. Sensburg (Mrągowo
   Mragowo
   Mrągowo is a town in the Warmian-Masurian Voivodeship of northeastern Poland, the capital of Mrągowo County and the seat the Gmina Mrągowo...
   
   today, Żądźbork between 1945-1947)