The euro (€) is one of the world's most important currencies and is the official currency of most European Union member states. The group of EU countries that have officially adopted the euro is known as the euro area, commonly called the Eurozone.

As of 2026, 21 European Union member states officially use the euro. Bulgaria became the newest member when it adopted the euro on 1 January 2026, increasing Eurozone membership from 20 to 21 countries.

It is important to understand that the terms Europe, European Union and Eurozone do not mean the same thing.

• Europe is the geographical continent.
• European Union (EU) is a political and economic union.
• Eurozone/euro area consists specifically of EU member states that have formally adopted the euro.
• Some European countries outside the EU also use the euro, but they are not members of the Eurozone.

This article explains the countries using the euro, when they adopted it, how the Eurozone operates, which EU countries still use their own currencies, and how countries qualify for euro membership.

What Is the Euro?

The euro is the common currency used by the members of the euro area.

Currency name: Euro
Currency symbol: €
ISO currency code: EUR
Subdivision: 1 euro = 100 cents
Central monetary authority: European Central Bank (ECB)

The euro was introduced as an accounting and electronic currency on 1 January 1999. Euro banknotes and coins subsequently entered general circulation on 1 January 2002.

Initially, 11 EU countries participated when the euro was introduced in 1999. The Eurozone subsequently expanded as additional EU members satisfied the requirements for adopting the currency.

Complete List of Eurozone Countries in 2026

The following 21 EU member states officially use the euro:

No.	Country	Euro Adoption
1	Austria	1999
2	Belgium	1999
3	Bulgaria	2026
4	Croatia	2023
5	Cyprus	2008
6	Estonia	2011
7	Finland	1999
8	France	1999
9	Germany	1999
10	Greece	2001
11	Ireland	1999
12	Italy	1999
13	Latvia	2014
14	Lithuania	2015
15	Luxembourg	1999
16	Malta	2008
17	Netherlands	1999
18	Portugal	1999
19	Slovakia	2009
20	Slovenia	2007
21	Spain	1999

The European Commission confirms that the euro area currently consists of 21 EU member states.

1. Austria

Capital: Vienna
Euro since: 1999
Previous currency: Austrian schilling

Austria is a Central European country known for its strong service sector, manufacturing industries, tourism and high standard of living. It joined the European Union in 1995.

Austria was among the original group of countries that introduced the euro in 1999. Euro banknotes and coins replaced the Austrian schilling in 2002.

2. Belgium

Capital: Brussels
Euro since: 1999
Previous currency: Belgian franc

Belgium is one of the founding members of European integration and hosts important institutions of the European Union.

Belgium participated in the first phase of the euro from 1999, with euro cash replacing the Belgian franc in 2002.

3. Bulgaria

Capital: Sofia
Euro since: 1 January 2026
Previous currency: Bulgarian lev

Bulgaria is the newest member of the Eurozone.

It joined the European Union in 2007 and formally adopted the euro on 1 January 2026, becoming the 21st member of the euro area.

The official conversion rate was fixed at:

€1 = 1.95583 Bulgarian lev

The Bulgarian National Bank also became part of the Eurosystem when Bulgaria adopted the euro.

Bulgaria's entry is particularly important when reading older articles about the Eurozone. Information published before 2026 may still state that there are only 20 Eurozone members.

4. Croatia

Capital: Zagreb
Euro since: 2023
Previous currency: Croatian kuna

Croatia joined the European Union in 2013.

On 1 January 2023, Croatia adopted the euro, replacing the Croatian kuna. Until Bulgaria's accession in 2026, Croatia was the newest member of the Eurozone.

Croatia's euro membership facilitates financial transactions and tourism with other euro-area economies.

5. Cyprus

Capital: Nicosia
Euro since: 2008
Previous currency: Cypriot pound

Cyprus is an island country in the eastern Mediterranean and joined the EU in 2004.

It adopted the euro on 1 January 2008, replacing the Cypriot pound.

6. Estonia

Capital: Tallinn
Euro since: 2011
Previous currency: Estonian kroon

Estonia is a Baltic country well known for its highly developed digital-government infrastructure and technology-oriented economy.

Estonia joined the EU in 2004 and adopted the euro on 1 January 2011.

7. Finland

Capital: Helsinki
Euro since: 1999
Previous currency: Finnish markka

Finland joined the European Union in 1995 and was one of the original countries participating in the euro.

It introduced the euro electronically in 1999 and euro cash in 2002.

8. France

Capital: Paris
Euro since: 1999
Previous currency: French franc

France is one of the largest economies in Europe and a founding member of the European integration project.

France was among the first countries to introduce the euro in 1999. Euro banknotes and coins replaced the French franc in 2002.

9. Germany

Capital: Berlin
Euro since: 1999
Previous currency: Deutsche Mark

Germany is Europe's largest national economy and plays a major role in the economic and monetary framework of the European Union.

Germany was a founding participant in the euro. The Deutsche Mark was replaced by euro cash in 2002.

The European Central Bank itself is headquartered in Frankfurt am Main, Germany.

10. Greece

Capital: Athens
Euro since: 2001
Previous currency: Greek drachma

Greece joined the European Communities in 1981 but was not part of the original 1999 euro group.

After satisfying the required conditions, Greece joined the euro area in 2001, allowing it to participate in the introduction of euro banknotes and coins in 2002.

11. Ireland

Capital: Dublin
Euro since: 1999
Previous currency: Irish pound

Ireland joined the European Communities in 1973.

It was one of the original countries adopting the euro in 1999. The Irish pound was replaced by euro banknotes and coins in 2002.

12. Italy

Capital: Rome
Euro since: 1999
Previous currency: Italian lira

Italy is one of the founding members of the European integration project and one of Europe's largest economies.

Italy participated in the euro from its introduction in 1999, and euro cash replaced the Italian lira in 2002.

13. Latvia

Capital: Riga
Euro since: 2014
Previous currency: Latvian lats

Latvia joined the European Union in 2004.

After fulfilling the necessary convergence requirements, Latvia adopted the euro on 1 January 2014.

14. Lithuania

Capital: Vilnius
Euro since: 2015
Previous currency: Lithuanian litas

Lithuania is the largest of the three Baltic states by population.

It joined the EU in 2004 and adopted the euro on 1 January 2015, following Estonia and Latvia into the Eurozone.

15. Luxembourg

Capital: Luxembourg
Euro since: 1999
Previous currency: Luxembourgish franc

Luxembourg is a small but economically significant European country and an important international financial centre.

It is a founding member of the European integration project and participated in the euro from 1999.

16. Malta

Capital: Valletta
Euro since: 2008
Previous currency: Maltese lira

Malta is a Mediterranean island country that joined the European Union in 2004.

Malta adopted the euro on 1 January 2008, at the same time as Cyprus.

17. Netherlands

Capital: Amsterdam
Euro since: 1999
Previous currency: Dutch guilder

The Netherlands is a founding EU member with a highly developed, trade-oriented economy.

It participated in the euro from 1999, with euro banknotes and coins replacing the Dutch guilder in 2002.

18. Portugal

Capital: Lisbon
Euro since: 1999
Previous currency: Portuguese escudo

Portugal joined the European Communities in 1986.

It became one of the original euro participants in 1999, and the escudo was replaced by euro cash in 2002.

19. Slovakia

Capital: Bratislava
Euro since: 2009
Previous currency: Slovak koruna

Slovakia joined the European Union in 2004.

After meeting the required economic and legal criteria, it adopted the euro on 1 January 2009.

20. Slovenia

Capital: Ljubljana
Euro since: 2007
Previous currency: Slovenian tolar

Slovenia joined the European Union in 2004.

On 1 January 2007, it became the first of the countries joining the EU in 2004 to subsequently adopt the euro.

21. Spain

Capital: Madrid
Euro since: 1999
Previous currency: Spanish peseta

Spain joined the European Communities in 1986 and is one of the largest economies in the Eurozone.

Spain participated in the euro from 1999, with euro cash replacing the peseta in 2002.

Eurozone Expansion Timeline

The expansion of the euro area can be summarized as follows:

Year	Countries Joining
1999	Austria, Belgium, Finland, France, Germany, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain
2001	Greece
2007	Slovenia
2008	Cyprus, Malta
2009	Slovakia
2011	Estonia
2014	Latvia
2015	Lithuania
2023	Croatia
2026	Bulgaria

This expansion brought the Eurozone to 21 members in 2026.

Are All European Union Countries Using the Euro?

No.

Membership in the European Union does not automatically mean that a country currently uses the euro.

Following Bulgaria's adoption in 2026, the EU countries outside the euro area are:

Czechia, Denmark, Hungary, Poland, Romania and Sweden.

Denmark is particularly important because it has a formal treaty opt-out from participating in the euro.

The other EU countries outside the euro area are generally expected to adopt the euro when they satisfy the applicable conditions.

Can Countries Outside the European Union Use the Euro?

Yes.

This creates an important distinction between:

using the euro

and

being a member of the Eurozone.

Several small European states outside the EU officially use the euro through monetary agreements with the European Union:

• Andorra
• Monaco
• San Marino
• Vatican City

These countries can use the euro and, subject to agreed limits and arrangements, issue euro coins with their own national designs.

However, because they are not EU member states, they are not members of the euro area.

What About Kosovo and Montenegro?

Kosovo and Montenegro also use the euro even though they are neither EU members nor Eurozone members.

Their situation differs from countries such as Monaco and San Marino because their use of the euro is not based on the same type of formal monetary agreement with the EU.

Therefore, a statement such as "every country using the euro is a Eurozone member" is incorrect.

Eurozone vs European Union

Feature	European Union	Eurozone
Type	Political and economic union	Monetary union
Common currency required?	No	Yes
Uses euro?	Some members	All members
Monetary policy controlled by ECB?	Not for every EU country	Yes
Denmark included?	Yes	No
Bulgaria included in 2026?	Yes	Yes

The Eurozone should therefore be understood as a monetary subset of the European Union.

Who Controls the Euro?

The central institution responsible for euro-area monetary policy is the European Central Bank (ECB).

The ECB is located in Frankfurt, Germany.

Together, the ECB and the national central banks of euro-area countries form the Eurosystem.

The ECB defines monetary policy for the euro area with the primary objective of maintaining price stability.

National governments, however, continue to control many areas of fiscal and economic policy, subject to EU economic-governance frameworks.

What Happens When a Country Adopts the Euro?

Joining the Eurozone is considerably more complicated than simply changing banknotes.

A country's national currency is replaced by the euro at an officially determined conversion rate.

Its central bank becomes integrated into the Eurosystem, and monetary policy is conducted within the common ECB framework.

The change affects:

bank accounts, cash, accounting systems, invoices, taxation systems, financial contracts, ATMs, payment terminals, banking infrastructure, government accounting, business software and consumer pricing.

Businesses may need to modify ERP, accounting, POS, invoicing and payroll systems to process EUR correctly.

Requirements for Joining the Eurozone

An EU country cannot simply announce that it wants to join the Eurozone immediately.

It must satisfy economic and legal conditions known as the convergence criteria, commonly called the Maastricht criteria.

These requirements concern areas such as:

• price stability;
• sound and sustainable public finances;
• exchange-rate stability;
• long-term interest rates;
• compatibility of national legislation with EU monetary rules.

Participation in Exchange Rate Mechanism II (ERM II) is also part of the convergence process.

The purpose is to demonstrate that an economy is sufficiently prepared to operate under the common monetary system without creating serious disruption for itself or the wider Eurozone.

Advantages of the Euro

One major advantage is the elimination of currency conversion between Eurozone countries.

A person travelling from Germany to Spain, for example, does not need to exchange Deutsche Marks for pesetas as would have been necessary before the euro.

Businesses trading between euro-area countries similarly avoid many foreign-exchange transactions.

Other potential advantages include:

Simpler cross-border trade: Businesses can invoice customers in the same currency across the Eurozone.

Greater price transparency: Consumers can compare prices between countries without first converting currencies.

Lower currency-conversion costs: Travellers and businesses avoid many exchange fees when moving money between euro countries.

Integrated financial markets: A common currency can facilitate investment and financial transactions across participating economies.

Simplified travel: Tourists can visit multiple Eurozone countries while using the same cash currency.

The ECB notes that the euro eliminates the need for currency exchange within the euro area and simplifies travel and trade.

Potential Challenges of Euro Membership

Euro membership also involves significant policy trade-offs.

The most important is the loss of an independent national monetary policy.

Before joining, a country's national central bank may be able to set monetary policy specifically for domestic economic conditions.

After joining, monetary policy is determined for the Eurozone as a whole.

This can create challenges because economic conditions can differ significantly among participating countries.

For example, one country could experience rapid inflation while another is experiencing weak economic growth.

A single monetary policy must take conditions across the currency union into consideration.

Euro Banknotes and Coins

Euro banknotes are standardized throughout the Eurozone.

Euro coins operate slightly differently.

Each coin has:

a common European side

and

a national side.

The national side allows participating countries to display nationally selected designs.

Despite different national designs, euro coins issued by one Eurozone country can normally be used throughout the entire euro area.

For example, a euro coin issued in Italy can be spent in Germany, France, Spain or Bulgaria.

Why Bulgaria's 2026 Entry Is Important

Bulgaria's accession is one of the most significant recent changes to the Eurozone.

The country formally introduced the euro on 1 January 2026, becoming the 21st EU member state using the common currency.

The Bulgarian lev ceased to be Bulgaria's official currency, and the Bulgarian National Bank became a euro-area national central bank.

Bulgaria was also integrated fully into Eurosystem TARGET services for large-value payments, instant payments, securities settlement and collateral management.

Therefore, websites, educational material and databases listing only 20 Eurozone countries should be updated.

Frequently Asked Questions (FAQ)

1. How many countries use the euro officially as members of the Eurozone?

As of 2026, 21 EU member states belong to the Eurozone. Bulgaria became the 21st member on 1 January 2026.

2. What is the newest Eurozone country?

Bulgaria is the newest Eurozone member.

It adopted the euro on 1 January 2026.

3. Which country joined before Bulgaria?

Croatia joined the Eurozone on 1 January 2023.

4. Is the euro used throughout Europe?

No. Many European countries continue to use their own national currencies.

5. Do all EU countries use the euro?

No.

Czechia, Denmark, Hungary, Poland, Romania and Sweden are currently outside the Eurozone.

6. Why doesn't Denmark use the euro?

Denmark has negotiated a formal opt-out from participation in the euro.

7. Does Sweden use the euro?

No. Sweden remains outside the Eurozone.

8. Does Poland use the euro?

No. Poland continues to use the Polish złoty (PLN).

9. Does Hungary use the euro?

No. Hungary uses the Hungarian forint (HUF).

10. Does Romania use the euro?

No. Romania uses the Romanian leu (RON).

11. Does Czechia use the euro?

No. Czechia uses the Czech koruna (CZK).

12. Does Bulgaria now use the euro?

Yes. Bulgaria officially adopted the euro on 1 January 2026.

13. What happened to the Bulgarian lev?

The euro replaced the lev as Bulgaria's official currency at the fixed conversion rate of:

€1 = 1.95583 Bulgarian lev.

14. Is the United Kingdom part of the Eurozone?

No. The United Kingdom is not an EU member and uses the pound sterling (GBP).

15. Does Switzerland use the euro?

No. Switzerland uses the Swiss franc (CHF).

16. Is Norway a Eurozone country?

No. Norway is not an EU member and uses the Norwegian krone (NOK).

17. Is Monaco a Eurozone member?

No.

Monaco uses the euro under a monetary arrangement, but it is not an EU member and therefore is not a member of the Eurozone.

18. Does Vatican City use the euro?

Yes. Vatican City uses the euro and can issue its own euro coins under arrangements with the EU, but it is not a Eurozone member.

19. Does San Marino use the euro?

Yes, but San Marino is not an EU or Eurozone member.

20. Does Andorra use the euro?

Yes. Andorra officially uses the euro under a monetary agreement with the EU, although it is not part of the Eurozone.

21. Does Kosovo use the euro?

Yes, the euro is used in Kosovo, but Kosovo is not a Eurozone member.

22. Does Montenegro use the euro?

Yes, Montenegro uses the euro but is not a member of the Eurozone.

23. What is the currency code for the euro?

The international ISO currency code is EUR.

24. What is the euro symbol?

The euro symbol is €.

25. When was the euro introduced?

The euro was introduced as an accounting/electronic currency in 1999, while euro banknotes and coins entered circulation in 2002.

26. Who controls euro monetary policy?

Monetary policy for the Eurozone is determined by the European Central Bank and the Eurosystem framework.

27. Where is the European Central Bank located?

The ECB is headquartered in Frankfurt am Main, Germany.

28. Can a country leave the euro?

Euro membership is designed as a deep and lasting form of monetary integration. EU treaties do not provide a simple routine mechanism comparable to changing an ordinary exchange-rate arrangement.

29. Are euro banknotes different in each country?

Euro banknotes follow common designs. Coins have a common European side and country-specific national sides.

30. Can a French euro coin be used in Germany?

Yes. Euro coins and banknotes are legal tender throughout the euro area, subject to the normal rules applying to cash payments.

Conclusion

The euro has developed from a common currency initially introduced by 11 EU countries in 1999 into a monetary union covering 21 EU member states in 2026.

The current Eurozone consists of:

Austria, Belgium, Bulgaria, Croatia, Cyprus, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Portugal, Slovakia, Slovenia and Spain.

Bulgaria's adoption of the euro on 1 January 2026 is the latest expansion of the currency union.

The distinction between Europe, the European Union, the Eurozone and countries merely using the euro is essential. Not every European country belongs to the EU, not every EU country currently uses the euro, and some countries outside the EU use the euro without being Eurozone members.

For businesses, travellers, accountants, financial institutions and software developers, understanding these distinctions is particularly important because euro adoption affects payments, banking, accounting, invoicing, pricing, taxation systems and cross-border commerce.

Reference: European Commission – EU Countries and the Euro and European Central Bank – The Euro.

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