Administrative divisions of Czechoslovakia

Czechoslovakia between 1918 and 1928, with five provinces or lands. Slovakia and Subcarpathian Rus newly created.

Czechoslovakia from December 1, 1928; the state administration was unified in both the former Austrian and Hungarian parts of the state, while the number of provinces was reduced to four (Moravia and Czech Silesia merged).

"Small, but ours": Czechoslovakia in 1938–39, with Slovakia and Subcarpathian Ruthenia as autonomous regions while the Sudetenland and southern Slovakia and Subcarpathian Ruthenia are ceded to Nazi Germany and Hungary

• 1918–1923: different systems based on the former Austrian territories (Kingdom of Bohemia, Margraviate of Moravia, and Duchy of Upper and Lower Silesia) and former Hungarian counties in the north (later forming Slovakia (21 counties) and Subcarpathian Ruthenia (4 counties)) were reorganized into three provinces (Czech: země, Slovak: krajiny – literally "lands") of Bohemia-Moravia-Silesia, 21 counties (župy) of Slovakia, and 4 counties of Subcarpathian Ruthenia (today's Zakarpattia Oblast in Ukraine); all provinces and counties were further divided into districts (okresy)
• 1923–1927: like 1918–1923, except that the above counties were replaced by 6 (grand) counties ((veľ)župy) in Slovakia and 1 (grand) county in Subcarpathian Ruthenia, and the number and borders of districts were changed in these two territories
• 1928–1938: 4 provinces: Bohemia, Moravia-Silesia, Slovakia and Subcarpathian Ruthenia; divided into districts
• late 1938–March 1939: like 1928–1938, but Slovakia and Subcarpathian Ruthenia were promoted to "autonomous lands", while the border regions were ceded to Germany (so-called Sudetenland) and Hungary (southern parts of Slovakia and Subcarpathian Ruthenia)
• 1939–1945: Bohemia and Moravia became a protectorate of Germany, the remainder of Subcarpathian Ruthenia annexed by Hungary, while Slovakia was nominally independent
• 1945–1948: like 1928–1938, except that Subcarpathian Ruthenia became part of the Soviet Union in 1945
• 1949–1960: 19 regions divided in 270 districts; Czech historical provinces/lands abolished
• 1960–1992: Ten regions plus Prague (and from 1970 also Bratislava), further divided into over 100 districts. Czech and Slovak Socialist Republics added as a layer above the regions at federalization in 1969.

From 1918 to 1928, the eastern Czechoslovakia, within what is now the Czech Republic, was divided into three administrative divisions known as lands: Bohemian Land, Moravian Land, and Silesian Land. The territories of Slovakia and Subcarpathian Ruthenia were divided into several regions.

From 1928 to 1939, Czechoslovakia was divided into five lands: Bohemian Land, Moravian-Silesian Land (including the Silesian branch office in the Moravian-Silesian Land), Slovakian Land, and the Subcarpathian Ruthenian Land.

The regions came into force on 24 December 1948. During this period, there were 19 total regions: 13 Czech and 6 Slovak as follows:

Czech regions

Map of the Czech regions of Czechoslovakia, highlighting the Prague Region

From 1954, the city of Prague was made into a city-region, separate from Prague Region.

• Brněnský kraj (Brno Region)
• Českobudějovický kraj (České Budějovice Region)
• Gottwaldovský kraj (Gottwaldov Region)
• Hradecký kraj (Hradec Králové Region)
• Jihlavský kraj (Jihlava Region)
• Karlovarský kraj (Karlovy Vary Region)
• Liberecký kraj (Liberec Region)
• Olomoucký kraj (Olomouc Region)
• Ostravský kraj (Ostrava Region)
• Pardubický kraj (Pardubice Region)
• Plzeňský kraj (Plzeň Region)
• Pražský kraj (Prague Region)
• Ústecký kraj (Ústí nad Labem Region)

The country consisted of 10 Regions ('kraje'), Prague, and (since 1970) Bratislava; further divided in 109–114 districts ('okresy').

The kraje were abolished temporarily in Slovakia in 1969–1970 and since late 1990 in whole Czechoslovakia. In addition, the two republics Czech Socialist Republic and Slovak Socialist Republic were established in 1969 during the federalization process. The word Socialist was removed from the republics' names in 1990 after the Velvet Revolution.

Since many regions changed significantly after the Velvet Divorce of 1993, here is list of their original names and current regions they approximately correspond to:

• Czech Republic#Administrative divisions
• Slovakia#Administrative divisions