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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The Three Seas Local Government Congress under the Honorary Patronage of the President of Poland



The 6 th edition of the Three Seas Local Government Congress will be held May 27-28, 2026, under the Honorary Patronage of the President of the Republic of Poland, Karol Nawrocki. This distinction recognises the growing importance of the event, which has become a key platform for cooperation among the countries of Central and Eastern Europe, both in the economic and infrastructural dimensions.



Over five editions of the Congress (2020–2025), more than 5,000 participants from 24 countries have taken part, 104 discussion panels have been held, and 64 foreign delegations have visited Lublin. The scale and international character of the event confirm its increasing role in shaping dialogue across the Three Seas region.




We, the countries representing Central and Eastern Europe (…) through the Three Seas Initiative, Via Baltica, and Via Carpatia, share not only our voice and vision of building a civic community, but also tangible results showing that the Baltic States and the countries of Central and Eastern Europe are capable of implementing major infrastructure projects, emphasised President Karol Nawrocki during his visit to Vilnius last month.



These words perfectly capture the spirit of the Three Seas Congress, which brings together political, academic, and business communities around a shared goal, building a strong, integrated, and cooperative Central and Eastern Europe.



It is also worth noting that in April 2025, Poland hosted the 10th Three Seas Initiative Summit. During the event, participants emphasised the importance of infrastructure and economic cooperation in the region and the need to strengthen cohesion across Central and Eastern Europe. This year, the cooperation format has been expanded to include new members – Albania and Montenegro joined the Three Seas Initiative in the capacity of associated participating states, while Spain and Turkey became new strategic partners. It has already been announced that the 11th Summit will take place in Croatia in 2026.



We cordially invite you to take part in the Three Seas Local Government Congress! Registration will open in the end of January. More details will soon be available at www.congress.lubelskie.pl and on our social media channels.

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