Administrative divisions development in Ukraine reviews the history of changes in the administrative divisions of Ukraine, in chronological order.

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The Russian Empire had acquired much of the territory inhabited by Ukrainians between the mid 17th and early 19th centuries, which was organized into nine Ukrainian governorates: Chernigov (Chernihiv in Ukrainian), Yekaterinoslav (Katerynoslav), Kiev (Kyiv), Kharkov (Kharkiv), Kherson, Podolia (Podillia), Poltava, Volhynia (Volyn), and the mainland part of Taurida (or Tavriia, without the Crimean peninsula). Additional lands annexed from Poland in 1815 were organized into the Kholm governorate in 1912.^[1]

After the events of 1917, which led to the Ukrainian People's Republic (UNR) to declare its independence, these governorates became subdivisions of the UNR, which also annexed Ukrainian-inhabited parts of Mogilev (Mahiliou), Kursk, Voronezh, and Minsk governorates in 1918.^[1][2] By the end of the Soviet–Ukrainian War in 1920, the Bolsheviks had made them part of the Ukrainian SSR.^[2] Soviet Ukraine was reorganized into 12 governorates, which were reduced to nine in 1922 upon the Soviet Union's founding, and then replaced with okruhas in 1925.^[1]

The West Ukrainian People's Republic in former Austro-Hungarian Empire territory was not subdivided into governorates, and would be annexed by the Second Polish Republic from 1920 until the Soviet invasion of 1939.

During the existence of the Ukrainian People's Republic and the Soviet Ukraine its administration division went through three changes.^{[citation needed]}

• governorate, 1919–1925
  • povit (county)
    • volost
• zemlia, 1918, not fully realized territorial administrative reform
• subdistrict, 1925-1936
  • okruha (district)
    • raion
• oblast, 1936–1991
  • raion and district (border okrug)

Also there existed national raions and national communities (selsoviets). In Ukraine also was established the Moldavian ASSR^{[clarification needed]} and later^[when?] also included Crimean ASSR.

List of known nationality-based raions of Ukraine in the 1920s and '30s:

In 1919, the northern Mhlyn, Novozybkiv, Starodub, and Surazh counties of Chernihiv Governorate, with their mixed Ukrainian–Belarusian–Russian population, were transferred from Ukraine to the newly established Gomel Governorate of the Russian republic.^[4] In February 1924, Tahanrih and Shakhty counties (Tahanrizka okruha and Shakhtynska okruha) were transferred from the Donetsk guberniia of the Ukrainian SSR to the North Caucasus krai of the Russian SFSR.^[5][6]

Just before World War II, Hungary with the help from Poland occupied Carpatho-Ukraine that was to secede from the falling apart Czechoslovakia after the Munich agreement plus some additional territories of Slovakia. Poland in turn also occupied some territories of Silesia.

In the fall of 1938, the southwestern territories of Subcarpathian Rus including the cities of Uzhhorod, Berehove, and Mukacheve were yielded to the Kingdom of Hungary.

In 1939, Carpatho-Ukraine was overrun by the Kingdom of Hungary.

Some of the newly acquired territories in 1939 were annexed and incorporated as Kárpátalja. Kárpátalja unlike most of the country, however, had a special administrative system with the intention of it being governed by the Ruthenian minority population. In practice, it was not the case. Kárpátalja was divided into three administrative delegations (közigazgatási kirendeltség) which were each divided into four districts (járás). The previously annexed territories of 1938 were divided into Bereg County and Ung County.

In 1939 and 1940, the Soviet Union launched an offensive into eastern Poland and eastern Romania. During these operations, the territories of Volhynia, Halychyna, Bukovina, and Budjak were added to the Ukrainian SSR. In the territories of Volhynia and Halychyna, six oblasts were created in 1939: Lviv Oblast, Drohobych Oblast, Stanislav Oblast, Ternopil Oblast, Volyn Oblast, and Rivne Oblast. In 1940, Bukovina was organized as Chernivtsi Oblast and Budjak as Izmail Oblast.

After the German invasion of 1941, Ukraine was split between three countries, Germany, Romania, and Hungary. Within Germany Ukraine also was divided between the General Government (Krakau), Reichskommisariat (centered in Rivne), and Wehrmacht administration closer to the Eastern Front.

Between 1944 and 1951 the border between Ukrainian SSR and Polish People's Republic changed a lot. There were at least five territorial transfers.

• October 1944 to Poland were transferred Horynets Raion, Lubachiv Raion, Uhniv Raion, Synyava Raion, and Lyashkiv Raion of the Lviv Oblast.
• March 1945 to Poland also were transferred Bircha Raion, Liski Raion, and western part of Peremyshl Raion with the city of Peremyshl from the Drohobych Oblast.
• May 1948 to Poland was also transferred Medyka Raion of Drohobych Oblast.
• In 1951 Drohobych Oblast yielded Nyzhno-Ustritsa Raion to Poland as well.
• February 15, 1951, several Polish localities were transferred to Ukraine as part of the territorial exchange which formed Zabuzk Raion with seat in Belz, including the city of Krystynopil. Later Zabuzk Raion was reassigned under Sokal Raion of Lviv Oblast.

Big changes in the administrative division in Ukraine took place in winter of 1954.

The new Cherkasy Oblast was created on January 7, mostly out of the southern raions of Kyiv Oblast, and some raions of Poltava and Kirovohrad Oblasts.

On February 15 Izmail Oblast was merged into Odesa Oblast. Several raions of the previous Odesa Oblast were transferred to the neighboring Kirovohrad and Mykolaiv Oblasts.

The Crimean Oblast was transferred from Russia to Ukraine on February 19.

Before the fall of Soviet Union in 1992 the Ukrainian SSR consisted of 25 oblasts and two cities of republican subordination, Kyiv and Sevastopol.

In 1958 Voroshylovhrad Oblast was renamed Luhansk, then in 1970 back to Voroshylovhrad, and in 1990 once again to Luhansk.

May 21, 1959, Drohobych Oblast was merged into Lviv Oblast

1965 Talalaiv Raion was transferred from Sumy Oblast to Chernihiv Oblast

1986 Chornobyl Raion and the city municipality of Prypiat were liquidated and merged with the Ivankiv Raion, Kyiv Oblast.

In 1988 the new city of Slavutych was established for victims of the Chornobyl catastrophe, in Chernihiv Oblast. The city was subordinated to the Kyiv Oblast.

On February 12, 1991, the Crimean oblast was restored to its pre-WWII status of autonomous Soviet socialist republic following a referendum.

After its declaration of independence in August 1991, and the dissolution of the Soviet Union in December, Ukraine grandfathered the whole Soviet system of administrative divisions. Cities of republic significance were transformed into cities with special status.^{[citation needed]}

• 24 oblasts (regions)
  • raions (districts)
  • cities of regional significance
  • urban raions
• 2 cities with special status
  • urban raions
• 1 autonomous republic (Crimea)
  • raions
  • cities of republic significance
  • urban raions

In February 1992, the Crimean ASSR's parliament renamed it the Republic of Crimea,^{[citation needed]} and in 1998 the Ukrainian parliament renamed it Autonomous Republic of Crimea, following disputes over the republic's constitution and level of autonomy. In February 2014, Russian forces occupied the peninsula including the Autonomous Republic of Crimea and city of Sevastopol, and in March formally annexed the territories to the Russian Federation, although it remained internationally recognized as part of Ukraine.^{[citation needed]}

After the start of the war in Donbas in the oblasts of Donetsk and Luhansk in April 2014, Ukrainian government forces fought to hold territory against separatist militias with a significant level of Russian manpower and military support. After a period of intense warfare involving Russian regular forces in 2014 and 2015, a ceasefire was declared and a relatively stable line of contact was established, although the semi-frozen conflict has continued to cost thousands of lives along the so-called grey zone that surrounds the line of contact. About a third of the area of the two Donbas oblasts remain under the de facto control of Russian-supported self-proclaimed Donetsk and Luhansk people's republics. In these cities and raions where the respective local governments cannot exercise their constitutional powers, Ukraine created civil–military administrations in February 2015.^[7]

In 2015 a new type of administrative unit was created, the amalgamated hromada, to help the financial and administrate power and independence of rural Ukraine.^[8] This means that settlement councils, rural councils, and cities of district significance can create new administrative units.^[8] According to draft constitutional changes submitted to the Verkhovna Rada (Ukraine's parliament) by President Volodymyr Zelensky in December 2019, the hromadas should replace the raions of Ukraine.^[9]

On 17 July 2020, the Verkhovna Rada (Ukraine's parliament) approved an administrative reform to merge most of the 490 raions, along with the "cities of regional significance" which had been separate from raions, into just 136 reformed raions. These 136 districts include ten in Crimea and several in Donetsk and Luhansk oblasts, which were and remain under Russian control. New third-level hromadas have taken over most tasks of the raions (education, healthcare, sport facilities, culture, and social welfare).^[10]

On 24 October 2023 President Volodymyr Zelenskyy signed Law No. 8263 that abolished the concept of "urban-type settlement" in Ukraine.^[11] Law No. 8263 was meant to facilitate "de-Sovietization of the procedure for solving certain issues of the administrative and territorial system of Ukraine."^[11] (In 1991 Ukraine became independent of the Soviet Union.^[12]) The only official classifications of inhabited locality in Ukraine remained a city (misto, an urban locality), a settlement (selyshche, a rural locality with a population of at least 5,000) and village (selo, a rural locality of less than 5,000).^[11]

• Administrative division of Ukraine (1918)
• Administrative divisions of Ukraine (1918–1925)
• Administrative divisions of Ukraine (1925–1932)
• Administrative divisions of the Ukrainian SSR
• Administrative divisions of Ukraine
• Soviet occupation of Bessarabia and Northern Bukovina
• Invasion of Poland
• Chernobyl catastrophe