Yugoslavia had various administrative divisions throughout its 74 years of existence.

From 1918 to 1922, the Kingdom of Serbs, Croats, and Slovenes continued to be subdivided into the pre-World War I divisions (districts, counties and kingdoms) of the Habsburg monarchy and the formerly independent Balkan kingdoms of Serbia and Montenegro.

The provinces (pokrajine) were:

The Vidovdan Constitution of 1921 established the Kingdom of Serbs, Croats, and Slovenes as a unitary state, instituting 33 new administrative oblasts (provinces) ruled from the center in 1922:

From 1929, the Kingdom of the Serbs, Croats and Slovenes was renamed to the Kingdom of Yugoslavia and was subdivided into nine new provinces called banovinas. Their borders were intentionally drawn so that they would correspond neither to boundaries between ethnic groups, nor to pre-World War I imperial borders. They were named after various geographic features, mostly rivers. Slight changes to their borders were made in 1931 with the new Yugoslav Constitution. The banovinas were as follows:

As an accommodation to Yugoslav Croats, the Banovina of Croatia (Banovina Hrvatska) was formed in 1939 from a merger of the Littoral (Maritime) and Sava Banovinas, with some additional territory from the Vrbas and Zeta Banovinas. Like Sava, its capital was Zagreb.

During World War II, the Kingdom of Yugoslavia was occupied and partitioned by the Axis powers and was divided into 3 Axis puppet states:

Other parts of the Kingdom of Yugoslavia were occupied by German, Italian, Hungarian, Bulgarian and Albanian Axis troops.