The Kingdom of Serbs, Croats and Slovenes was formed in 1918 and was initially divided into counties and districts (1918–1922) and administrative oblasts (1922-1929).

In 1929, the name of the country was changed to the Kingdom of Yugoslavia and new administrative units known as banovinas (Serbo-Croatian: banovine, бановине) were introduced.

A smaller part of the district was attached to Vuka County within the Independent State of Croatia.

The Belgrade City Administration was completely surrounded by the Danube Banovina, whose capital was Novi Sad.

[1] Inhabitants of the district were mainly Serbs, but members of some other ethnicities (Germans, Hungarians, Croats, etc) were present in the area.