Eastern Europe includes approximately 20 countries, though the exact count depends on which definition you use. The UN geoscheme lists 10 countries in Eastern Europe, but the broader geopolitical and cultural definition — shaped by the Cold War and the former Eastern Bloc — encompasses around 20 nations.
What Counts as Eastern Europe?
Defining Eastern European countries is surprisingly controversial. The United Nations geoscheme places only 10 countries in Eastern Europe: Belarus, Bulgaria, Czech Republic, Hungary, Moldova, Poland, Romania, Russia, Slovakia, and Ukraine. However, the popular understanding of "Eastern Europe" is much broader, typically including the Balkans and the Baltic states — regions that were part of the Eastern Bloc or the Soviet Union during the Cold War.
Many people in the Czech Republic, Poland, Hungary, Slovenia and Croatia prefer the term Central Europe and actively reject being called Eastern European. The objection has a literature behind it: in 1984 the Czech novelist Milan Kundera argued in an essay on the tragedy of Central Europe that these were culturally Western nations that had been placed on the wrong side of a line by force in 1945, and the argument shaped how the region described itself after 1989. The Visegrad Group — Poland, Czechoslovakia and Hungary, founded at a 1991 summit in the Hungarian town of Visegrad — was in part an assertion of that identity.
The Baltic states classify themselves as Northern European, and the UN geoscheme agrees, grouping Estonia, Latvia and Lithuania with the Nordic countries rather than with Eastern Europe. The distinctions are not pedantry: they track real differences in political orientation, EU and NATO membership, income levels and, in several cases, which alphabet and which church a country inherited.
UN-Defined Eastern European Countries (10 Countries)
The United Nations Statistics Division groups these 10 countries as Eastern Europe:
1. Russia
- Capital: Moscow | Population: ~144 million | Area: 17,098,242 km²
Russia is the world's largest country, spanning Eastern Europe and Northern Asia. Only about 23% of Russia's territory is in Europe (west of the Urals), but this European portion contains approximately 77% of Russia's population. Moscow and St. Petersburg are among Europe's largest cities.
2. Ukraine
- Capital: Kyiv | Population: ~37 million | Area: 603,628 km²
Ukraine is the second-largest European country by area (after Russia). It is known for its fertile black soil (chernozem), making it one of the world's most important agricultural producers — often called the "breadbasket of Europe."
3. Poland
- Capital: Warsaw | Population: ~38 million | Area: 312,696 km²
Poland is the largest economy in the UN's Eastern Europe group and a major EU member state. It has experienced rapid economic growth since its transition from communism in 1989 and is increasingly considered Central European.
4. Romania
- Capital: Bucharest | Population: ~19 million | Area: 238,397 km²
Romania is unique in Eastern Europe as a Romance-language country (Romanian is derived from Latin). It features the Carpathian Mountains, Transylvania, and the Danube Delta — Europe's best-preserved river delta and a UNESCO biosphere reserve.
5. Czech Republic (Czechia)
- Capital: Prague | Population: ~10.8 million | Area: 78,871 km²
Czechia strongly identifies as Central European rather than Eastern European. Prague is one of Europe's most visited cities. The country has the lowest unemployment rate in the EU and a highly developed industrial economy.
6. Hungary
- Capital: Budapest | Population: ~9.6 million | Area: 93,028 km²
Hungary is a landlocked country on the Great Hungarian Plain. Budapest, straddling the Danube, is famous for its thermal baths, architectural grandeur, and the historic Buda Castle. Hungarian (Magyar) is a Finno-Ugric language unrelated to any of its neighbors' languages.
7. Belarus
- Capital: Minsk | Population: ~9.2 million | Area: 207,600 km²
Belarus is a landlocked country between Russia and Poland. It has been governed by President Alexander Lukashenko since 1994 and maintains closer political and economic ties to Russia than most other Eastern European countries. It is sometimes called "Europe's last dictatorship."
8. Bulgaria
- Capital: Sofia | Population: ~6.5 million | Area: 110,879 km²
Bulgaria is located in the southeastern Balkans with a Black Sea coastline. It is the birthplace of the Cyrillic alphabet and has been an EU member since 2007. The country is known for its rose oil production, ancient Thracian heritage, and affordable tourism.
9. Slovakia
- Capital: Bratislava | Population: ~5.4 million | Area: 49,035 km²
Slovakia became independent in 1993 after the peaceful dissolution of Czechoslovakia. It joined the EU in 2004 and the Eurozone in 2009. The country is known for its mountain landscapes, particularly the High Tatras and numerous medieval castles.
10. Moldova
- Capital: Chișinău | Population: ~2.6 million | Area: 33,851 km²
Moldova is the poorest country in Europe by GDP per capita. It was part of Romania until 1940 when it was annexed by the Soviet Union. The breakaway region of Transnistria remains a frozen conflict zone with Russian troops stationed there.
Additional Countries Often Included (Broader Definition)
Beyond the UN definition, these countries are frequently classified as Eastern European due to Cold War history, Soviet influence, or geographic position:
Baltic States
- Estonia — Capital: Tallinn | Pop: ~1.3 million (prefers "Northern Europe")
- Latvia — Capital: Riga | Pop: ~1.8 million
- Lithuania — Capital: Vilnius | Pop: ~2.8 million
The three Baltic states were Soviet republics from 1940-1991. All three are now EU and NATO members and have undergone rapid economic development since independence.
Balkan Countries
- Serbia — Capital: Belgrade | Pop: ~6.6 million
- Croatia — Capital: Zagreb | Pop: ~3.9 million (EU member, Euro adopted 2023)
- Bosnia and Herzegovina — Capital: Sarajevo | Pop: ~3.2 million
- North Macedonia — Capital: Skopje | Pop: ~1.8 million
- Montenegro — Capital: Podgorica | Pop: ~620,000
- Albania — Capital: Tirana | Pop: ~2.8 million
- Kosovo — Capital: Pristina | Pop: ~1.8 million (partially recognized)
Four Definitions, Four Different Lists
Rather than one correct count, there are several systems in active use, each drawing the line for its own purpose.
| Definition | Count | What it is drawing |
|---|---|---|
| UN geoscheme | 10 | A statistical grouping; puts the Baltics in Northern Europe and the Balkans in Southern Europe |
| Cold War Eastern Bloc | about 20 | Warsaw Pact members plus Soviet republics plus Yugoslavia and Albania; a political line, not a geographic one |
| Central Europe (self-description) | removes 6-8 | Moves Poland, Czechia, Slovakia, Hungary, Slovenia and often Croatia out of the category entirely |
| Strict geography | varies | By longitude the continent's midpoint falls near Lithuania or western Ukraine, which would make Poland western Europe |
That last row is not a rhetorical point. Several countries maintain monuments marking the geographic centre of Europe — one near Purnuskes in Lithuania, endorsed by a French national geographic institute calculation in 1989, another near Rakhiv in western Ukraine dating to an Austro-Hungarian survey, and others in Belarus and Slovakia. All of them sit well east of where most people mentally place the middle of the continent.
Joining the West: the EU and NATO Timeline
The single largest change in the region since 1991 has been institutional, and it happened in a few concentrated waves.
NATO admitted Poland, Czechia and Hungary in 1999, then seven more in 2004 — Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia and Slovenia. Albania and Croatia followed in 2009, Montenegro in 2017 and North Macedonia in 2020 after its name dispute with Greece was settled.
EU enlargement came in 2004 with the accession of eight post-communist states at once, the largest single expansion in the union's history; Bulgaria and Romania joined in 2007 and Croatia in 2013. Ukraine and Moldova were granted candidate status in June 2022, with Georgia following in December 2023. Serbia, Montenegro, North Macedonia, Albania and Bosnia and Herzegovina are all at various stages of candidacy.
Two countries sit outside this trajectory entirely. Belarus has moved in the opposite direction, deepening its union-state arrangements with Russia. Kosovo declared independence in 2008 and is recognised by roughly half of UN members, but not by Serbia, Russia or China, nor by five EU states — Spain, Greece, Cyprus, Romania and Slovakia — which is why it appears on some lists of the region and not others.
Five Language Families in One Region
For an area often described as culturally uniform, the linguistic map is unusually fragmented.
- Slavic covers most of it — Russian, Ukrainian, Belarusian, Polish, Czech, Slovak, Bulgarian, Serbian, Croatian, Bosnian, Montenegrin, Slovenian and Macedonian. The full breakdown is in the list of Slavic countries.
- Romance accounts for Romanian and its Moldovan standard, descended from the Latin of Roman Dacia and surrounded on all sides by Slavic speakers.
- Uralic covers Hungarian and Estonian, which are related to each other and to Finnish, and to nothing else in the region.
- Baltic is Latvian and Lithuanian — the Slavic languages' closest relatives but a separate branch. Lithuanian is often cited as the most archaic living Indo-European language, retaining features lost everywhere else.
- Albanian forms its own branch of Indo-European with no close living relative at all.
The alphabet split runs across the same ground: Cyrillic in Russia, Ukraine, Belarus, Bulgaria, North Macedonia and Serbia, Latin everywhere else, with Serbia and Montenegro using both officially.
Reading This List Without Getting It Wrong
The practical answer is that Eastern Europe is a Cold War term that outlived the Cold War, and the number changes with the purpose of the count. For a statistical table, use the UN's 10. For anything historical about the twentieth century, the Eastern Bloc framing of roughly 20 is what the sources mean. For writing about the region today, check what each country calls itself — Prague and Ljubljana will tell you they are Central European, and Tallinn will tell you it is Nordic.
Two adjacent regional labels overlap this one heavily without matching it. The Balkan countries are defined by the peninsula rather than by politics, which is why Greece is a Balkan country and not an Eastern European one. The Baltic states are three specific countries on the Baltic Sea, not a synonym for the wider post-Soviet space.