The Reichsgau Lower Danube (German: Reichsgau Niederdonau) was an administrative division of Nazi Germany consisting of areas in Lower Austria, Burgenland, southeastern parts of Bohemia, southern parts of Moravia, later expanded with Devín and Petržalka.

From 1933 onwards, after the Nazi seizure of power, the Gaue increasingly replaced the German states as administrative subdivisions in Germany.

[2] Under the Ostmarkgesetz law of 14 April 1939 with effect of 1 May, the Austrian Gaue were raised to the status of Reichsgaue and their Gauleiters were subsequently also named Reichsstatthalters.

[3] At the head of each Gau stood a Gauleiter, a position which became increasingly more powerful, especially after the outbreak of the Second World War.

Local Gauleiters were in charge of propaganda and surveillance and, from September 1944 onwards, the Volkssturm and the defence of the Gau.