In Ukraine, the term
oblast denotes a primary
administrative division. Under the
Russian Empire and into the 1920s, Ukraine was divided between several
governorates. The term
oblast was introduced in 1932 by
Soviet authorities when the Ukrainian SSR was divided into seven oblasts, replacing the previous subdivision system based on
okruhas and encompassing 406 raions (districts). The first oblasts were
Vinnytsia Oblast,
Kyiv Oblast,
Odesa Oblast,
Kharkiv Oblast, and
Dnipropetrovsk Oblast. Soon after that, in the summer of 1932,
Donetsk Oblast was formed out of eastern parts of Kharkiv and Dnipropetrovsk oblasts; in the fall of 1932
Chernihiv Oblast was formed on the border of Kyiv and Kharkiv oblasts. Between 1935 and 1938, there were several newly created and self-governed special
border okrugs (okruhas) located along the western border of the
Soviet Union in Ukraine and Belarus. Upon liquidation of the okruhas in 1937–1938, Kyiv, Vinnytsia, Odesa, and Kharkiv oblasts were each split into four additional oblasts (
Zhytomyr Oblast,
Kamianets-Podilsky Oblast (later Khmelnytskyi),
Mykolaiv Oblast,
Poltava Oblast). Just before
World War II, the
Donetsk Oblast was split into Stalino Oblast and
Voroshylovhrad Oblast and the
Kirovohrad Oblast was created out of portions of Kyiv, Mykolaiv and Odesa oblasts. During World War II, Ukraine added eight more oblasts of the
West Ukraine and
Bessarabia. Upon the occupation of Ukraine by
Nazi Germany the territory was split between
General Government,
Kingdom of Romania and
Reichskommissariat Ukraine and carried out a completely different administrative division, see
Reichskommissariat Ukraine. With the re-establishing of Soviet power in the state after the war, the administrative division by oblast resumed, adding one more oblast—
Zakarpattia. In 1954, the
Crimean Oblast was
transferred from the
Russian Soviet Federative Socialist Republic to the Ukrainian SSR; parts of the surrounding oblasts were incorporated into the
Cherkasy Oblast, while
Izmail Oblast was absorbed by
Odesa Oblast. In 1959,
Drohobych Oblast was merged with
Lviv Oblast. Most of Ukraine's oblasts are named after their respective
administrative centers, which are also the largest and most developed cities in the region. Oblast populations range from 904,000 in
Chernivtsi Oblast to 4.4 million in the eastern
Donetsk Oblast.
Original in 1932 • Dnipropetrovsk Oblast, centered in Dnipropetrovsk (subdivided into raions) • Kharkiv Oblast, centered in Kharkiv (subdivided into raions) • Kyiv Oblast, centered in Kyiv (subdivided into raions) • Odesa Oblast, centered in Odesa (subdivided into raions) • Vinnytsia Oblast, centered in Vinnytsia (subdivided into raions) • raions of republican subordination (directly to Kharkiv) ;Later there were added: • Donetsk Oblast, centered in Stalino (initially – Artemivsk) (created on 17 July 1932 out of raions of Kharkiv and Dnipropetrovsk oblasts and raions of republican subordination) • Chernihiv Oblast, centered in Chernihiv (created on 15 October 1932 out of raions of Kharkiv and Kyiv oblasts)
Further division in 1937–1938 • Kamianets-Podilsk Oblast, centered in Kamianets-Podilsk (out of raions of Vinnytsia Oblast) • Mykolaiv Oblast, centered in Mykolaiv (out of raions of Odesa and Dnipropetrovsk oblasts) • Poltava Oblast, centered in Poltava (out of raions of Kharkiv and Kyiv oblasts) • Zhytomyr Oblast, centered in Zhytomyr (out of raions of Vinnytsia and Kyiv oblasts) • Donetsk Oblast was split into Stalino Oblast, centered in Stalino, and Voroshylovhrad Oblast, centered in Voroshylovhrad
New creations and World War II territorial expansions in 1939–1940 • Kirovohrad Oblast, centered in Kirovohrad (out of raions of Kyiv, Odesa, Poltava and Mykolaiv oblasts) • Sumy Oblast, centered in Sumy (out of raions of Chernihiv, Poltava and Kharkiv oblasts) • Zaporizhzhia Oblast, centered in Zaporizhzhia (out of raions of Dnipropetrovsk and Mykolaiv oblasts) • Drohobych Oblast, centered in Drohobych • Ivano-Frankivsk Oblast, centered in Ivano-Frankivsk • Lviv Oblast, centered in Lviv • Volyn Oblast, centered in Lutsk • Rivne Oblast, centered in Rivne • Tarnopol Oblast, centered in Tarnopol • Chernivtsi Oblast, centered in Chernivtsi • Izmail Oblast, centered in Izmail
Postwar • Kherson Oblast, centered in Kherson • Zakarpattia Oblast, centered in Uzhhorod • Cherkasy Oblast, centered in Cherkasy • Crimean Oblast, centered in Simferopol
Maps File:Ukrainian Socialist Soviet Republic 1929—1930.svg|The
okruhas of Ukraine in 1929–1930 File:Ukraine 1932-1937.png|After 1935; including recently created Donetsk and Chernihiv Oblasts and
border okruhas File:Ukrainian SSR 1937—1938.svg|Border okruhas are liquidated and four additional oblasts created in 1937 File:Ukraine 1939-1940.png|Creation of additional oblasts just before
World War II File:Map of Ukrainian oblasts (1946–1954).png|Post-war divisions of Ukraine ==Constitutional provisions and authority==