According to the 1931 Constitution of the Kingdom of Yugoslavia,
The Zeta Banovina is bounded on the north by the southern boundaries of the Littoral and Drina Banovinas ... as far as the intersection of the boundaries of the three districts of Dragačevo, Žiča and Studenica. From this point and as far as the national frontier with Albania, the boundary of this Banovina follows the eastern boundaries of the districts of Studenica, Deževa, Mitrovica, Drenica and Drin, including all these districts. Then the boundary coincides, up to the Adriatic Sea, with the Yugoslav-Albanian State frontier.[citation needed]
In 1941, the World War IIAxis Powers occupied the remaining area of the Zeta Banovina. A small area around the Gulf of Kotor was annexed by Fascist Italy while much of the rest was joined with Italian-occupied Montenegro and Albania. Eastern areas were made part of German-occupied Serbia and western areas part of Independent State of Croatia.