Administrative Division of the Three Seas Initiative Countries



Bundeslands, districts, komitats… What are the administrative division systems used in the 3SI countries? In order to use the same regional units for statistical purposes, in 2003 the EU introduced NUTS – the Nomenclature of Territorial Units for Statistics. The NUTS classification is divided into three levels: NUTS 1, NUTS 2 and NUTS 3. The latter two are used for evaluating whether countries meet eligibility criteria for support within the framework of UE structural policy. At the NUTS 2 level, aid is provided to problem areas with low development and at the NUTS 3 level to areas that need restructuring and to border regions. At the same time, official administrative units of each country have different names and sizes and their governing bodies have different competences.

Austria is divided into 9 states [Bundesländer]: Burgenland, Carinthia, Lower Austria, Upper Austria, Salzburg, Styria, Tyrol, Vorarlberg, and Vienna – this division corresponds to NUTS 2. The federal states are further divided into statutory cities and regions. The exception is the Vienna, which is divided into districts.

The basic administrative division of Bulgaria corresponds to the NUTS 3 level – 28 provinces [oblasti] bearing the same names as their capital cities. Twenty-six of them are: Blagoevgrad, Burgas, Haskovo, Dobrich, Gabrovo, Yambol, Kyustendil, Kardzhali, Lowech, Montana, Pazardzhik, Pernik, Pleven, Plovdiv, Razgrad, Ruse, Silistra, Sliven, Smolyan, Stara Zagora, Shumen, Targovishte, Varna, Veliko Tarnovo, Vidin, Vratsa. The last two are Sofia City and the Sofia district, as the capital of Bulgaria constitutes a separate administrative entity.

Another country of the Three Seas Initiative is Croatia. Until 2014 that country had remained outside the NUTS classification. At present, Croatia is divided into 20 counties [županija] and one city- county – Zagreb; this division corresponds to NUTS 3 level. The names of particular counties are as follows: Bjelovar-Bilogora, Brod-Posavina, Zadar, Krapina-Zagorje, Sisak-Moslavina, Karlovac, Varaždin, Koprivnica-Križevci, Primorje-Gorski Kotar, Lika-Senj, Virovitica-Podravina, Požega-Slavonia, Osijek-Baranja, Šibenik-Knin, Vukovar-Syrmia, Split-Dalmatia, Istria, Dubrovnik-Neretva, Međimurje, Zagreb.

The administrative division of the Czech Republic corresponds to the NUTS 3 level. The country is divided into the so-called ‘kraje’, i.e. self-governing regions, thirteen in total. The fourteenth separate administrative unit is the City of Prague. The Czech regions are as follows: Central Bohemian, South Bohemian, Plzeň, Karlovy Vary, Ústí nad Labem, Liberec, Hradec Králové, Pardubice, Vysočina, South Moravian, Olomouc, Zlin, Moravian-Silesian.

Estonia is altogether a different case. Its local administrative units are 15 provinces, yet in the NUTS 3 classification Estonia has only got five regions. This is because only two provinces correspond in size to NUTS 3 level units. These are Põhja-Eesti and Kirde-Eesti. The remaining regions have been combined into groups. The Kesk-Eesti region is made up of three provinces, the Western region comprises four provinces, while the Southern region – six provinces.

Our eastern neighbour, Lithuania, has 10 units corresponding to NUTS 3 level. Those are the following districts: Klaipeda, Kaunas, Marijampole, Alytus, Panevėžys, Šiauliai, Tauragė, Telšiai, Utena, Vilnius.

Latvia, on the other hand, constitutes a single NUTS 2 unit with five NUTS 3-level statistical regions: Kurzeme, Latgale, Riga, Vidzeme and Zemgale. The NUTS 3 region of Riga is divided into two planning regions, Riga City and Riga Region – Pieriga; hence, in fact, Latvia has six regions at the NUTS 3 level.

The NUTS classification for Poland is the most obvious, as 17 voivodships are NUTS 2 level units: Dolnośląskie, Kujawsko-Pomorskie, Lubelskie, Lubuskie, Łódzkie, Małopolskie, Mazowieckie, Opolskie, Podkarpackie, Podlaskie, Pomorskie, Śląskie, Świętokrzyskie, Warmińsko-Mazurskie, Wielkopolskie and Zachodniopomorskie. The Warsaw capital district separated from the Mazowieckie voivodship forms the 17th administrative unit.

The administrative division of Romania is perceived as simpler than in other 3SI countries. There are eight regions at the NUTS 2 level. This simplicity is also reflected by their names: București – Ilfov, Centru, Sud, Sud-Est, Sud-Vest, Nord-Est, Nord-Vest and Vest.

Another country that has ‘kraje’ as administrative units is Slovakia. Those are NUTS 3 level units and there are eight of them: Bratislava, Trnava, Trenčín, Nitra, Žilina, Banská Bystrica, Prešov and Košice.

The situation in Slovenia is similar to that in Estonia: local administrative units are communes. However, 212 communes of Slovenia have been grouped into 12 regions corresponding to NUTS 3 classification units. The regions of Eastern Slovenia are: Mura, Drava, Carinthia, Savinja, Central Sava, Lower Sava, Southeast Slovenia, and Littoral; those in Western Slovenia are: Central Slovenia, Upper Carniola, Gorizia, and Coastal–Karst Region.

The komitats mentioned in the beginning of this text are administrative units of Hungary. They are NUTS third-level units and there are twenty of them. Their names are: Budapest, Bács-Kiskun, Baranya, Békés, Borsod-Abaúj-Zemplén, Csongrád, Fejér, Győr-Moson-Sopron, Hajdú-Bihar, Heves, Jász-Nagykun-Szolnok, Komárom-Esztergom, Nógrád, Pest, Somogy, Szabolcs-Szatmár-Bereg, Tolna, Vas, Veszprém, Zala.

As can be seen on the example of the Three Seas Initiative countries, the NUTS statistical division not always matches the administrative division of a given country, just like in the case of Estonia, Latvia, or Slovenia. The main intention behind the introduction of the NUTS classification is solving the problem of differences in administrative divisions and inevitable changes of those divisions in order to avoid inaccuracies in comparing statistical data.

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Registration for the 6th Three Seas Local Government Congress is now open



The 6th edition of the Three Seas Local Government Congress will take place May 27-28, 2026, in Lublin. It is a forum that brings together the visions, experience, and potential of the Central and Eastern European countries.



The Three Seas Local Government Congress is a prestigious international event organised by the Lubelskie Voivodeship. The Congress serves as a platform for cooperation among 13 countries of the Three Seas Initiative and associated members (Ukraine, Moldova, Albania, and Montenegro), focusing on infrastructure development, security, innovation, and cross-border cooperation. Over the past five editions, the Congress has gathered more than 5000 participants from over 25 countries, including representatives of governments, local and regional authorities, business, and academia. The event is held under the Honorary Patronage of the President of the Republic of Poland. Representatives of more than 350 regions from the Three Seas Initiative are invited to attend the Congress. It is a multidimensional event. Its accompanying activities include the Economic Forum, a scientific session of the Three Seas Universities Network, and the 3Seas Youth Forum. The upcoming edition of the Congress will be expanded to include a Security Forum addressed to local governments from the Three Seas region.



The Economic Forum comprehensively supports the offer of SMEs from the Lubelskie Voivodeship. Its aim is to create conditions for the development of entrepreneurship and investor services, as well as to build lasting economic relationships and facilitate the exchange of experience and inspiration in the field of the economy. Topics addressed during the Forum will include, among others: Feminine Lubelskie, Innovation, entrepreneurship (B2B Zone / Exhibition Zone), the 20th anniversary of Marka Lubelskie, and international cooperation. The Economic Forum is a unique platform for networking, signing agreements, and presenting technologies and solutions that create real opportunities for regional economic cooperation in times of global tension.



The Security Forum is a key accompanying event of the Three Seas Local Government Congress, dedicated to challenges and opportunities in the broadly understood field of security for regions involved in the Network of the Three Seas Regions project. At its core is the exchange of experience and the building of cooperation among local governments, organizations, experts, and business representatives from the 13 countries of the Three Seas Initiative. Topics discussed during the Forum will include, among others: local resilience, health and social security, protection of critical infrastructure, cybersecurity, and the role of local governments in crisis response. The co-organiser of the Security Forum is Defence24.



We cordially invite you to take part in the Congress!

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