Does Greece allow dual citizenship with the USA?

Yes, in effect. Taking US citizenship doesn’t end Greek citizenship, and an American claiming Greek citizenship by descent keeps a US passport. Greece gets there in an unusual way. Its Citizenship Code doesn’t declare dual citizenship a right. Instead, Article 16 says a Greek who voluntarily takes a foreign citizenship loses Greek citizenship only with the Interior Minister’s permission, so without a ministry decision you simply hold both. The flip side matters more: Greek citizenship is hard to shed, and the ministry can refuse to release a man with military obligations. For descendants, the live issues are older family rules, registration and, for men, military service.

The short answer

• Greek citizen who becomes American: stays Greek, unless the minister grants release.
• Born Greek and American: you hold both, and Greece doesn’t make you choose.
• American claiming by descent: no need to give up US citizenship, but every generation must be registered.
• American of Greek origin naturalising from abroad: the procedure doesn’t list giving up US citizenship.
• American with no Greek origin, living in Greece: naturalisation generally takes seven years’ legal residence, and the official conditions don’t list giving up US citizenship.
• Man registering as Greek: check your military position first.

What the law says

Article 4(3) of the Constitution sets the outer limit. All people with the qualifications set by law are Greek citizens, and withdrawal of citizenship is allowed only for voluntary acquisition of another citizenship or for service in a foreign country contrary to national interests, under conditions the law sets out. So the Constitution permits a loss rule without requiring one.

The law that fills this in is the Citizenship Code, ratified by Law 3284/2004 (Government Gazette A 217, 10 November 2004). Article 16, as quoted on the state’s procedures registry, has three parts:

• Article 16(1). A person who voluntarily acquired a foreign citizenship, or took a public post abroad that carries that country’s citizenship, gives up Greek citizenship after the minister’s permission. For exceptional reasons permission can come after the foreign citizenship was acquired, and then the loss takes effect when it’s granted.
• Article 16(2). Someone who already holds a foreign citizenship gives up Greek citizenship if the minister accepts their application. The loss takes effect on acceptance.
• Article 16(3). The Citizenship Council gives an opinion first. Permission can’t be granted, or an application accepted, if the applicant has or is late on a military obligation, or is being prosecuted for a felony or misdemeanour.

The ministry’s Circular 40 of 23 July 2014 explains how this works. Article 16(1) is for cases where the foreign citizenship requires giving up Greek citizenship first, and the loss comes only after the new citizenship is acquired, so nobody is left stateless. Article 16(2) is for dual citizens, from birth or by naturalisation, whose career or life abroad is seriously held back by being Greek. The Code has no automatic loss for simply taking a US passport.

Getting out is harder than staying in

Elsewhere in Europe the worry is losing citizenship by accident. In Greece it’s the opposite. There are two ways to leave voluntarily, and neither is a formality.

Release under Article 16

MITOS, the official registry of state procedures, lists these conditions: you are an adult, you live permanently abroad, you hold a foreign citizenship so you won’t be stateless, you aren’t being prosecuted, and a man has no outstanding military obligation or has a legal exemption as a permanent resident abroad or for studies. You must also have acquired, or be about to acquire, the citizenship of a country that bars multiple citizenship, or have taken a public post in a country that doesn’t allow foreign citizenship.

The ministry wants a document proving the need, such as a foreign public job offer, or confirmation that the country doesn’t accept multiple citizenship. That means the United States, which allows dual nationality, won’t normally be the reason on its own. You apply in person at the consulate. The Citizenship Council’s opinion doesn’t bind the minister.

Renunciation under Article 18

An adult living abroad can declare that their genuine link with Greece no longer exists. The ministry’s examples include not feeling Greek, having no contact with Greek life, not speaking the language and having no family, social or economic ties. MITOS adds that you must hold another citizenship. You declare it in person before the consul, the Citizenship Council’s opinion must be favourable, and the decision is published in the Government Gazette.

What happens after a loss

• It’s personal. The circular says a loss under Articles 16 or 18 doesn’t affect the citizenship of the spouse or children. Minor children can ask for their own loss only once they are adults.
• The register changes. The municipality is told to strike the person from the municipal register (dimotologio) and, for a man, the male register.
• Coming back. The Code has no express route. The ministry says that, as settled practice, someone who lost citizenship under Article 16 can regain it by naturalising as a person of Greek origin once the reason has gone. The circular describes that practice only for Article 16.

The other ways Greek citizenship ends

• Being stripped of it (Article 17). The minister can act against someone who took public service abroad and stays in it, against Greek interests, after a formal call to leave. The same goes for someone who, while living abroad, acted for a foreign state in ways incompatible with being Greek and contrary to Greek interests. The Citizenship Council must give a reasoned, binding opinion, the loss starts on publication in the Gazette, and it doesn’t affect the person’s spouse or children.
• Foreign adoption (Article 20). A Greek child adopted by a foreigner can lose Greek citizenship by a minister’s decision, on the adopter’s application, if the child acquires the adopter’s citizenship. A military obligation or a criminal prosecution blocks it.
• Citizenship through marriage (Article 21). A foreign woman who became Greek by marrying a Greek and keeps her foreign citizenship can drop Greek citizenship by a declaration.

Older rules that decide descent claims

Today’s Article 1 says the child of a Greek father or a Greek mother is Greek from birth. For older generations the law was narrower, and the Code still carries the repairs. These dates matter more to most families than the dual citizenship rule itself.

• Greek mother and foreign father, before 8 May 1984. That date is the publication of Law 1438/1984. A child born earlier in a valid marriage to a foreign father can become Greek by declaration under Article 14(1). The declaration is made in person, and it takes effect from its own date, not from birth.
• Greek father and foreign mother, civil marriage, before 18 July 1982. Civil marriages from that date on are recognised. MITOS says a child born earlier within such a civil marriage can become Greek by declaration under Article 14(2), and the marriage record is checked to see what kind it was. So a Greek American whose Greek father married a foreign woman by civil ceremony alone may not have been Greek at birth, even though the father was.
• Children of the people who declare. Under Article 14(4), their children become Greek with them only if they are minors and unmarried on the date of the declaration. An adult child gets nothing from a parent’s later declaration.
• Women who married foreigners. A Greek woman who lost citizenship by marrying a foreigner before 8 May 1984 can regain it by a declaration under Article 22.
• Children recognised by a foreign father. A child of a Greek mother, born before 8 May 1984, who lost citizenship through legitimation or recognition by a foreign father can reclaim it under Article 23.
• Cases that need a decision. MITOS also describes a declaratory decision under Article 26 for certain older marriages, and it flagged that procedure on 6 November 2026 as being reworked because of legal changes.

What descendants claiming by descent need to know

Dual citizenship is the easy part of a Greek claim. Work through the rest in this order:

1. Find the ancestor in the municipal register. See our guide to the dimotologio. If an ancestor lost citizenship by a ministry decision, the circular says their entry should have been struck out, so the register is your best evidence.
2. Check naturalisations before 2004. The Code in force today dates from 2004 and replaced the 1955 Code. We couldn’t open the 1955 text, so we can’t quote how it worked. If an ancestor naturalised before 2004, don’t assume an answer from a US certificate alone. The certificate shows the date, and the Greek register shows whether Greece recorded a loss. Our guide to USCIS naturalisation records helps with the first half.
3. Test each birth and marriage. Compare each one with 18 July 1982 and 8 May 1984. Our Greek citizenship through grandparents guide walks through registering one generation at a time.
4. If the line is broken, look at Article 10. People of Greek origin living abroad can apply through their consulate to naturalise. MITOS says the consulate verifies Greek origin and a Greek national consciousness. You apply in person and the fee is 100 euros. Each case is assessed, and the Code makes it naturalisation, not recognition of citizenship from birth.

Routes and costs are compared in our Greek citizenship by descent guide.

Military service for men

This is the real price of Greek dual citizenship for men, and it ties back to Article 16(3): an outstanding military obligation blocks release. Law 5265/2026 took effect on 10 January 2026 and replaced the earlier rules, so older advice may be wrong.

• Permanent residents abroad. Under Article 193 of the new law, as MITOS sets it out, this status covers people already living abroad from 1 January of the year they enter their sixteenth year of age until 31 December of the year they turn 18. It isn’t acquired if, in that period, you spend over six months in Greece in any calendar year.
• The transition. Men who don’t fit that test can apply by 31 December 2028 under the old Article 25 of Law 3421/2005, if they held permanent resident status on 10 January 2026 or gain it under the old rules by 31 December 2028. The old test was a main and permanent home abroad for 11 continuous years, or a livelihood abroad for seven.
• Keeping the deferral. Every three years until 45, during September and October, you file a permanent resident certificate with the military service office.
• New citizens by declaration. The Defence Ministry’s procedure gives a one-year deferral from the date of municipal registration. They can also move to a reduced six-month service if they wish.

These rules are detailed and depend on your dates, so ask the consulate or the military service office about your own position before you register.

The American side

Military service is also where the two countries’ rules meet. Under 8 U.S.C. 1481, loss of US nationality needs a voluntary act done with the intention of giving it up. The list of such acts includes serving in foreign armed forces, but only forces at war with the US or service as a commissioned or non-commissioned officer. The State Department’s Foreign Affairs Manual says naturalising abroad doesn’t automatically cost you US citizenship, and that intent to keep it is presumed.

The Manual also says that when you’re in the other country of your nationality, that country has a predominant claim on you, and that dual nationality may hamper US consular help. A Greek American in Greece should expect to be treated as Greek. More on this is in European citizenship by descent for Americans.

Is the law changing?

We found no bill before the Hellenic Parliament on 6 November 2026 that would change Articles 1, 14, 16 or 18, but Parliament’s site and the ministry’s site refused our requests, so that isn’t a firm finding. The change we could confirm is the military law above. Check with a consulate before relying on any of this for a decision.

Practical steps

1. Get the register extract for your ancestor and look for any deletion. Our document chain guide covers the rest of the paperwork.
2. Find each marriage record. Note whether it was civil or religious, and the date.
3. If a parent could use Article 14, remember the declaration must be made in person and helps only minor, unmarried children.
4. Men: settle the military question before registering, especially if you plan to spend long periods in Greece.
5. If you may need to leave Greek citizenship later, check the Article 16 conditions now, because a US passport alone won’t usually be enough.

To check whether you have a claim, use our free citizenship by descent checker. For how Greece compares with other countries, see dual citizenship by descent, country by country.

Frequently asked questions

Official sources

• MITOS: loss of Greek citizenship on acquiring a foreign citizenship, Greek (Article 16; updated 3 November 2026) and renunciation, Greek (Article 18)
• Interior Ministry: Circular 40 of 23 July 2014 on Articles 16 and 18, Greek (Diavgeia)
• MITOS: declaration, birth to a Greek mother, Greek and birth to a Greek father, Greek (Article 14)
• MITOS: declaratory decision on citizenship from birth, Greek (Article 26)
• MITOS: Greek woman regaining citizenship lost by marriage, Greek (Article 22) and reacquisition by the child of a Greek woman (Article 23)
• MITOS: Naturalisation of expatriates residing abroad (Article 10) and naturalisation of foreigners, Greek
• MITOS: deferral for permanent residents abroad, Greek (Law 5265/2026; updated 5 November 2026) and deferral for new citizens, Greek
• Law 3284/2004, Greek Citizenship Code, text as passed, Greek (Athens Bar Association copy; Articles 1, 14, 16, 17, 18, 20, 21, 22 and 23)
• Constitution of Greece, English text (Article 4(3); General Secretariat for Equality site)
• US Department of State: 7 FAM 080, Dual Nationality and 8 U.S.C. 1481

Checked against these sources on 6 November 2026. The Interior Ministry, Foreign Ministry, gov.gr and Hellenic Parliament websites refused automated access that day, so we couldn’t read the ministry’s consolidated Code. Articles 14, 16 and 18 are taken from MITOS, which was updated that week. Articles 1(1), 17, 20 and 21 are from the text as passed in 2004 and could have changed since. Translations are ours. Only the Interior Ministry and Greek consulates can decide your case; confirm with your consulate before you act.