Administrative divisions of Nazi Germany
The Nazi Gaue were formed in 1926 as Nazi party districts of the respective German states and Prussian provinces as shaped in the aftermath of World War I. Each Gau had an administrative leader, the Gauleiter (Gau leader). Though Länder and Prussian provinces continued to exist after the Enabling Act of 1933, their administration was reduced to a rudimentary body attached to the respective Nazi Gau administration in the Gleichschaltung process. In total, Germany consisted of 32 Gaue in 1934, and 42 Gaue at its collapse in 1945.
The regions occupied in 1938 (Anschluss of Austria, Sudetenland from Czechoslovakia by the Munich Agreement) and early 1939 (Klaipėda Region or Memelland from Lithuania) as well as the areas conquered during the Second World War were either incorporated into existing Gaue or organised in Reichsgaue, similar to the Gaue in all but name. In the Reichsgaue, the Gauleiter also carried the position of Reichsstatthalter., thereby formally combining the spheres of both party and state offices.
Eventually, in the aftermath of its defeat in the war, and the Yalta Conference, Germany would lose not only the newly annexed territories but some of the territories it held before the Nazi government assumed power; it would also spend most of the following second half of the 20th century divided into two separate states.
Gaue, Reichsgaue and Länder 
The Gaue existed parallel to the German states, the Länder, and Prussian provinces throughout the Nazi period. Pro forma, the Administrative division of Weimar Germany was left in place. The plan to abolish the Länder was ultimately given up because Hitler shrank away from structural reforms, a so-called Reichsreform, fearing it would upset local party leaders. For the same reason, the borders of the Gaue remained unchanged within Germany throughout this time. The Gaue were only enlarged through the adding of occupied territories after 1938. While the Länder continued to exist, the real power on local level did lay with the Gauleiters, not the Minister Presidents of the German states. The Gauleiters were directly appointed by Hitler and only answerable to him. In practice, interference from above was rare and their power almost absolute.
Gaue established in 1934 
|English name||German name||Headquarters||Established||Notes|
|Baden||Baden||Karlsruhe||1934||Formed from the state of Baden; in 1940-45 the Gau included the former French départements of Bas-Rhin and Haut-Rhin as Baden-Elsaß|
|Bayreuth||Bayreuth||Bayreuth||1934||Formed from part of the state of Bavaria; originally named Bayrische Ostmark, renamed Gau Bayreuth in 1942; also incooperated parts of Czechoslovakia from 1938|
|Düsseldorf||Düsseldorf||Düsseldorf||1934||Formed from the northern half of the Prussian province of the Rhine|
|East Prussia||Ostpreußen||Königsberg||1934||Formed from the Prussian Province of East Prussia; from 1939 also included territories annexed from Poland|
|Eastern Hanover||Ost-Hannover||Lüneburg||1934||Formed from the northern, central, and eastern parts of the Prussian Province of Hanover|
|Electoral Hesse||Kurhessen||Kassel||1934||Formed from the northern half of the Prussian province of Hesse-Nassau|
|Cologne-Aix-la-Chapelle||Köln-Aachen||Cologne||1934||Formed from the north-central part of the Prussian province of the Rhine|
|Essen||Essen||Essen||1934||Formed from the northern tip of the Prussian province of the Rhine|
|Franconia||Franken||Nuremberg||1934||Formed from part of the state of Bavaria|
|Greater Berlin||Groß-Berlin||Berlin||1934||Formed from the Prussian province of Greater Berlin|
|Halle-Merseburg||Halle-Merseburg||Halle||1934||Formed from the southern half of the Prussian Province of Saxony|
|Hamburg||Hamburg||Hamburg||1934||Formed from the state of Hamburg|
|Hesse-Nassau||Hessen-Nassau||Frankfurt am Main||1934||Formed from the state of Hesse and the southern half of the Prussian province of Hesse-Nassau|
|Koblenz-Trier||Koblenz-Trier||Koblenz||1934||Formed from the southern half of the Prussian province of the Rhine; renamed Gau Moselland in 1942, following the incorporation of the formerly independent country of Luxembourg|
|Lower Silesia||Niederschlesien||Breslau||1934||Formed in the Prussian Province of Lower Silesia|
|Magdeburg-Anhalt||Magdeburg-Anhalt||Dessau||1934||Formed from the Free State of Anhalt and the northern half of the Prussian Province of Saxony|
|Main-Franconia||Mainfranken||Würzburg||1934||Formed from part of the state of Bavaria|
|March of Brandenburg||Mark Brandenburg||Berlin||1934||Formed from the Prussian province of Province of Brandenburg|
|Mecklenburg||Mecklenburg||Schwerin||1934||Formed from the state of Mecklenburg-Strelitz and the Free State of Mecklenburg-Schwerin|
|Munich-Upper Bavaria||München-Oberbayern||Munich||1934||Formed from part of the state of Bavaria|
|Pomerania||Pommern||Stettin||1934||Formed from the Prussian Province of Pomerania|
|Saar-Palatinate||Saarpfalz||Neustadt an der Weinstraße||1934||Formed from the Bavarian Palatinate and the Prussian Saarland; renamed Gau Westmark in 1940 after the incooperation of parts of Lorraine|
|Saxony||Sachsen||Dresden||1934||Formed from the state of Saxony|
|Schleswig-Holstein||Schleswig-Holstein||Kiel||1934||Formed from the Prussian Province of Schleswig-Holstein, the Free City of Lübeck and territory belonging to the Free State of Oldenburg|
|Southern Hanover-Brunswick||Südhannover-Braunschweig||Hanover||1934||Formed from the Free State of Brunswick and the southern and western parts of the Province of Hanover|
|Swabia||Schwaben||Augsburg||1934||Formed from part of the state of Bavaria|
|Thuringia||Thüringen||Weimar||1934||Formed from the state of Thuringia and adjacent Prussian Province of Saxony|
|Upper Silesia||Oberschlesien||Kattowitz (from 1939)||1934||Formed in the Prussian Province of Upper Silesia, also incooperated parts of Poland from 1939|
|Weser-Ems||Weser-Ems||Oldenburg||1934||Formed from the Free State of Oldenburg (excluding outlying territories), the state Free Hanseatic City of Bremen and the far western part of the Prussian Province of Hanover|
|Westphalia-North||Westfalen-Nord||Münster||1934||Formed from the Free State of Lippe and the northern half of the Prussian Province of Westphalia|
|Westphalia-South||Westfalen-Süd||Dortmund||1934||Formed from the southern half of the Prussian Province of Westphalia|
|Württemberg-Hohenzollern||Württemberg-Hohenzollern||Stuttgart||1934||Formed from the Free People's State of Württemberg and the Prussian Province of Hohenzollern|
Reichsgaue established in the 1930s 
New Reichsgaue were established after the Anschluss of Austria and the incorporation of Sudetenland following the Munich Agreement. Southern parts of Czechoslovakia also gained by the Munich Agreement were not made part of Reichsgau Sudetenland, but incorporated into the northern Reichsgaue of former Austria.
|English name||German name||Headquarters||Established||Notes|
|Carinthia||Kärnten||Klagenfurt||1938||Formed from the former Austrian federal state of Carinthia and Eastern Tyrol, included from 1941 was Upper Carniola (German: Oberkrain), Slovenia|
*However, in 1943 Hitler toured the Gau and assured Gauleiter Hugo Jury that the capital would be Brünn (Brno) in the near future.
|1938||Formed from the former Austrian federal state of Niederösterreich and northern Burgenland; included from 1939 were parts of southern Moravia|
|Upper Danube||Oberdonau||Linz||1938||Formed from the former Austrian federal state of Oberösterreich and Ausseerland, a part of Styria; included from 1939 were parts of southern Bohemia|
|Salzburg||Salzburg||Salzburg||1938||Formed from the former Austrian federal state of Salzburg|
|Sudetenland||Sudetenland||Reichenberg||1938||Formed from the predominantly German speaking parts of Czechoslovakia which were ceded to Germany after the Munich Agreement|
|Styria||Steiermark||Graz||1938||Formed from the former Austrian federal state of Styria and southern part of Burgenland; included from 1941 was Lower Styria, Slovenia.|
|Tyrol-Vorarlberg||Tirol-Vorarlberg||Innsbruck||1938||Formed from the former Austrian federal state of Vorarlberg and the northern part of Tyrol|
|Vienna||Wien||Vienna||1938||Formed from the former Austrian federal state of Vienna and surrounding parts of former Niederösterreich|
Reichsgaue established during the Second World War 
Of the territories annexed from Poland and the Free City of Danzig in 1939, Reichsgau Wartheland and Reichsgau Danzig-West Prussia were created. Annexed territories of pre-war Poland not within these two Reichsgaue was incorporated into the neighboring Gaue East Prussia and Silesia. The Grand Duchy of Luxembourg as well as Alsace-Lorraine, annexed from pre-war France in 1940, were attached to the bordering Southwestern Gaue of Nazi Germany. Two further Reichsgaue in Belgium were established in 1944, and also annexed de jure to Germany.
|English name||German name||Headquarters||Established||Notes|
|Danzig–West Prussia||Danzig–Westpreußen||Danzig||1939||Formed in the Free City of Danzig and the Polish region of the Pomeranian Voivodeship, which were both occupied by Germany in 1939, as well as the pre-1939 German Governorate of West Prussia within then East Prussia|
|Flanders||Flandern||Antwerp||1944||Formed in the Flemish Region of Belgium, comprising the Dutch-speaking provinces of Antwerp, Limburg, East Flanders, West Flanders, the arrondissement of Brussels (except the city of Brussels itself), and the arrondissement of Leuven in the then-province of Brabant (the present-day province of Flemish Brabant).|
|Wallonia||Wallonien||Namur||1944||Formed in the Walloon Region of Belgium, comprising the Francophone provinces of Hainaut, Liège but the cantons of Eupen, Malmedy and Sankt Vith, Luxembourg, Namur, and the arrondissement of Nivelles in the contemporary province of Brabant (now part of the separate province of Walloon Brabant).|
|Wartheland||Wartheland||Posen||1939||Formed primarily in the Polish region of the Poznań Voivodeship and incooperated areas of surrounding Voivodeships after the German occupation of Poland|
There was also an extraterritorial Gau named Auslandsorganisation for party members overseas. Its headquarters were in Berlin. This Auslandsgau was considered to be the 43rd Gau of Nazi Germany.
Operational Zones 
After the overthrow of Benito Mussolini, the Italian government secretly began negotiations with the Allies about Italy switching sides to the Allied camp. In retaliation the Germans occupied large parts of Italy, freed Mussolini, and re-installed him as the puppet ruler of a new fascist state in those parts that were occupied by the German army. While officially in control over all the areas held by erstwhile Fascist Italy, large parts in the northeast located between Switzerland and the Adriatic were re-organized as Operational Zones (Operationszonen). These were informally annexed by Germany, and attached to adjacent Gaue of the Reich. There were two such Operational Zones:
|English name||German name||Headquarters||Established||Notes|
|Operational Zone of the Adriatic Littoral||Operationszone Adriatisches Küstenland (OZAK)||Triest||1943||Formed out of the Italian-occupied areas of Yugoslav Slovenia, the Istrian peninsula, and Friuli and Gorizia provinces. Attached (not incorporated) to Reichsgau of Carinthia.|
|Operational Zone of the Alpine Foothills||Operationszone Alpenvorland (OZAV)||Bozen||1943||Formed out of former South Tyrol, Italian Trentino, and adjacent smaller parts of northeastern Italy. Attached (not incorporated) to Reichsgau of Tirol-Voralberg.|
In a supplementary OKW order dated 10 September 1943, Hitler decrees on the establishment of further Operational Zones in Northern Italy, which were the stretch all the way to the French border. Unlike Alpenvorland and Küstenland, these zones did not immediately receive high commissioners (oberster kommissar) as civilian advisors, but were military regions where the commander was to exercise power on behalf of Army Group B. Operation zone Nordwest-Alpen or Schweizer Grenze was located between the Stelvio Pass and Monte Rosa and was to contain wholly the Italian provinces of Sondrio and Como and parts of the provinces of Brescia, Varese, Novara and Vercelli. The zone of Französische Grenze was to encompass areas west of Monte Rosa and was to incorporate the province of Aosta and a part of the province of Turin, and presumably also the provinces of Cuneo and Imperia.
General Government 
In those parts of Poland that were not directly annexed into the German Reich a separate civil administration was set up called the General Government (of the Occupied Polish Territories). While theoretically outside the boundaries of the Reich proper, it was considered part of Greater Germany by Nazi officials as an "autonomous" region (i.e. not directly subordinated to the Berlin government).
It was in turn sub-divided into four distrikten (districts).
Protectorate of Bohemia and Moravia 
After the resulting agreement at the Munich Conference had granted Germany control over considerable parts of interwar Czechoslovakia, the remainder was formally subordinated to German rule in March 1939. While Slovakia became a separate satellite state of Germany, the remaining Czech lands were turned into a Protectorate of Bohemia and Moravia under German dominion.
Two separate structures for its territorial administration existed within the protectorate. The Protectorate was officially divided into two Länder (lands): Bohemia and Moravia, which were in turn sub-divided into a number of smaller units. The Nazi party implemented a completely different form of organization by setting up four separate party districts in the area, and subordinating these organizationally to the surrounding Gaue and Reichsgaue: Sudetenland, Bayreuth (Bayerische Ostmark), Lower Danube, and Upper Danube. These two methods continued to co-exist in the protectorate for the entire duration of its existence.
Planned future districts 
The Nazi government openly pursued and practiced aggressive territorial expansionism, intending to further extend the already greatly increased territorial base of the German state. In anticipation of these expected future territorial enlargements, potential new districts were theorized upon at length by Nazi ideologists, government officials, and territorial planning departments. These expansions were intended to take place in two distinct ways:
Territorial expansion into Eastern Europe 
In order to expand the Lebensraum of the German people the Slavic populations of Eastern Europe were intended to be wiped out through a combined process of extermination, expulsion, starvation, and enslavement that would effectively Germanize these territories in the long run. Nazi racial offices planned that the colonization with Germanic peoples of these conquered eastern territories was to proceed most intensively in the three so-called Siedlungsmarken (Settlement marches) or Reichsmarken of Ingermannland (Ingria), the Memel-Narew area, and the Southern Ukraine and the Crimean peninsula. The latter of these was intended to be newly re-organized as a Gotengau (Gau of the Goths), in honor of the Crimean Goths who had at one point dwelled there. Of the Baltic countries, Peipusland was proposed as a replacement-name for Estonia, and Dünaland for Latvia.
In a conference on July 16, 1941 discussing the future organization of the conquered Soviet territories Hitler stated his intention to turn not only the above-mentioned areas, but also the entire Baltic region (Reichskommissariat Ostland), the Volga German colony, and the Baku district into future Reichsgebieten (Reich territories). On 3 November 1941 he also elaborated on the toponymic aspect of Germanizing the east:
In the eastern territories I will replace the Slavic geographic names with German names. The Crimea could for instance be called Gotenland. [...] We need names that will confirm our rights which go back for two-thousand years.—Adolf Hitler, 
The central and upper Vistula valley within the General Government were variously discussed as having to become either a single Vandalengau (Gau of the Vandals) or 3-5 other new Reichsgaue. An earlier proposal from 1939 also advocated for the creation of a Reichsgau Beskidenland, which was to stretch from the area to the west of Cracow to the San river in the east. In Axis-occupied Yugoslavia, Sepp Janko, Nazi representative of Danube Swabian interests, pushed for the establishment of a Reichsgau Banat or Prinz-Eugen-Gau, which would have encompassed the Yugoslavian territories of Bačka, Banat, parts of Transylvania (Siebenbürgen) and Baranya.
Annexation of the Germanic countries 
The Nazi racial categorization of the ethnic groups of Europe classified the Northern Europeans, especially those closely related to the Germans (itself considered to be a single nationality of which Swiss and Austrians were nothing but sub-regional identities at best) such as the Dutch, the Flemings, the Danish, Norwegians, Swedish, and English as part of a superior Aryan-Nordic master race (Herrenrasse). Following the integration of Austria into a Greater Germany (Großdeutschland), Hitler decided that he would follow the same policy in the future for all other countries that he regarded by virtue of their perceived racial qualifications as "belonging" to the Reich. This meant that the Low Countries and the Scandinavian states were eventually to be annexed into a much larger Greater Germanic Reich (Großgermanisches Reich) by being broken up into smaller state and party administrative units, such as Denmark into a Gau Nordmark, and the Netherlands into a Gau Westland.
Afterwards the very notion of these countries ever having been independent or separate from the rest of the Reich was to be suppressed indefinitely. The objective called for the inauguration of a new period of rapidly enforced Gleichschaltung, the end result of which would be that aside from their local "language dialects" these countries were to become perfect duplicates of National Socialist Germany in all political and social respects.
In addition it was intended to revert the western borders of Germany with France to those of the late-medieval Holy Roman Empire. A strip of eastern France from the mouth of the Somme to Lake Geneva (the so-called "closed" or "forbidden" zone of German-occupied France was prepared to be annexed to the German Reich as Reichsgau Burgund, with Nancy (Nanzig) as the capital.
See also 
- Administrative division of Weimar Germany
- Administrative divisions of the German Democratic Republic
- Administrative divisions of Germany
- Polish areas annexed by Nazi Germany
- States of the German Empire
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