Can you have dual nationality

The short answer

Whether you can have dual nationality depends on the countries involved, since each sets its own rules. Some allow it; others do not. So there is no single global answer, and the position depends on the specific countries whose nationality is in question.

For Singapore specifically, the general position is that it does not allow adults to hold dual citizenship. So becoming a Singapore citizen usually means giving up another nationality. The sections below explain the general picture and Singapore’s stance.

It depends on the countries involved

The central point is that dual nationality is governed by the rules of each country involved. For it to be possible, both countries would generally need to permit it. If either does not allow dual nationality, holding both can be a problem.

So to know whether you can have dual nationality, you would look at the rules of each relevant country. There is no universal rule; it is the combination of the countries’ laws that determines whether it is possible.

Singapore's general position

For Singapore, the general position is that it does not allow adults to hold dual citizenship. A person is expected to hold a single citizenship as an adult, which is why becoming a Singapore citizen usually involves renouncing another nationality.

So if Singapore is one of the countries in question, the practical answer for adults is that dual citizenship is not generally permitted. This shapes both how one becomes a citizen and how one keeps that status.

Becoming a Singapore citizen means renouncing another

Because of this stance, becoming a Singapore citizen as an adult generally requires renouncing your existing nationality. This is a significant, largely irreversible step, and it is part of the closing formalities of becoming a citizen, alongside the oath.

So if keeping another nationality matters to you, this is a central consideration before pursuing Singapore citizenship. It does not make citizenship impossible, but it makes the decision a weighty one to approach with full awareness.

Taking up another citizenship as a Singaporean

The single-citizenship principle also works the other way. A Singapore citizen who voluntarily acquires or exercises another citizenship can put their Singapore status at risk, since it conflicts with the rule against dual citizenship for adults.

So dual nationality is not something a Singapore citizen can simply take on quietly. If you are a citizen considering another nationality, treat it as a serious decision with real consequences, and confirm the position with ICA.

Children and dual nationality

Children can sometimes hold dual nationality for a period, for example where they acquire Singapore citizenship and another nationality at birth. However, the general expectation is that a person holds a single citizenship as an adult, so a young dual national is usually expected to resolve this by a certain age.

So a family with a young dual national should understand this early. Not giving up the other citizenship by the required point can put the child’s Singapore citizenship at risk, so confirm the current rules and timing with ICA.

Other countries vary

Beyond Singapore, countries vary widely. Some permit dual nationality freely, some allow it in limited circumstances, and others do not allow it at all. So whether dual nationality is possible in a given case depends entirely on the specific countries.

So if your question involves countries other than Singapore, you would need to check each country’s rules. A general assumption that dual nationality is or is not allowed does not hold across countries.

At a glance

Situation	General position
Singapore adults	Dual citizenship generally not allowed
Becoming a Singapore citizen	Usually requires renouncing another nationality
Singaporean taking another citizenship	Can put Singapore status at risk
Young dual nationals	Usually must resolve by a certain age
Other countries	Rules vary; check each country

Dual nationality depends on the countries involved. Confirm Singapore’s rules with ICA.

How to check your situation

Identify the countries whose nationality is in question.

Check each country's rules on dual nationality.

For Singapore, note that adults generally cannot hold dual citizenship.

If becoming a Singapore citizen, expect to renounce another nationality.

For a young dual national, resolve it within the required time.

Confirm Singapore's rules with ICA and other countries' with their authorities.

Checking each country’s rules is the reliable way to know whether dual nationality is possible for you.

The distinction between nationality and citizenship

In this context, nationality and citizenship are generally used to mean the same thing: your legal belonging to a country as one of its own. So dual nationality and dual citizenship usually refer to the same idea of holding two at once, and Singapore’s restriction applies to that idea for adults.

So do not be confused by the two terms. Whether the question is framed as dual nationality or dual citizenship, the Singapore position for adults is the same, and the rules of each country involved are what determine whether holding two is possible.

Why Singapore takes this position

Singapore’s single-citizenship stance reflects a view that citizenship should be singular and undivided, with a clear, exclusive allegiance. This is a deliberate policy, and it is why dual citizenship for adults is not generally permitted.

So the position is not incidental but principled. Understanding this helps make sense of why renunciation is part of becoming a citizen and why acquiring another nationality can jeopardise Singapore citizenship.

What renouncing another nationality involves

Where becoming a Singapore citizen requires renouncing another nationality, it is worth understanding that this is a formal, significant step with real consequences. Giving up a nationality can affect rights and ties connected to that country, and it is generally not easily reversed.

So do not treat renunciation as a mere formality. Understand what giving up your other nationality means for you before you reach that point, and where the consequences are complex, consider appropriate advice alongside confirming the process with ICA.

A young dual national in the family

If your family includes a child who holds dual nationality, it is worth planning early for the point at which they are expected to hold a single citizenship. Being aware of the timing avoids a situation where the child’s Singapore citizenship is put at risk by inaction.

So understand the requirement and the age by which it applies, and plan accordingly. Confirming the current rules and timing with ICA well in advance lets the family make an informed decision rather than facing it unprepared.

Do not try to hold both quietly

Because the single-citizenship rule is a genuine one, trying to quietly hold two citizenships as an adult where Singapore is involved is not a safe strategy. Acquiring or exercising another citizenship can jeopardise your Singapore status, whether or not it is immediately apparent.

So approach dual nationality honestly rather than trying to work around the rules. If your situation genuinely involves two countries, understand each one’s position and act within the rules, confirming the Singapore side with ICA.

Common misconceptions

What people get wrong

That dual nationality is universally allowed or banned. It depends on the countries involved.
That Singapore allows adults to hold dual citizenship. It generally does not.
That you can quietly hold both. Acquiring another citizenship can risk your Singapore status.
That children can keep dual nationality indefinitely. They usually must resolve it by a certain age.
That one country’s rules are enough. Both countries’ rules matter for dual nationality.

Clearing these up shows that dual nationality is country-specific, and restricted for Singapore adults.

Confirm with the relevant authorities

For Singapore’s rules on dual citizenship and nationality, ICA is the authoritative source, and for another country’s rules, its own authorities are. Because these can differ and be refined over time, confirm the position for each relevant country rather than relying on general assumptions.

Using the relevant authorities for the specifics, and this guide for the general picture, means you understand whether dual nationality is possible in your particular situation.

The bottom line

To sum up: whether you can have dual nationality depends on the countries involved, since each sets its own rules. For Singapore specifically, adults generally cannot hold dual citizenship, so becoming a citizen usually means renouncing another nationality, and acquiring another citizenship as a Singaporean can put your status at risk. Children can sometimes hold dual nationality for a time but usually must resolve it by a certain age.

So check each relevant country’s rules, and for Singapore, treat dual citizenship for adults as generally not permitted, and do not try to hold both quietly. Understand what renouncing another nationality involves before committing, and plan early for any young dual national in the family. For the authoritative position, confirm with ICA and the other country’s authorities.

For the fuller picture, see our guides to Singapore Citizenship eligibility and Singapore Citizenship application process.

Frequently asked questions

Can you have dual nationality?

It depends on the countries involved, since each sets its own rules. Some permit dual nationality; others do not. For Singapore specifically, adults generally cannot hold dual citizenship, so becoming a Singapore citizen usually means renouncing another nationality, and acquiring another citizenship as a Singaporean can put your status at risk. Confirm each country's rules with its authorities, and Singapore's with ICA.

Does Singapore allow dual citizenship?

Generally not for adults. Singapore's position is that a person should hold a single citizenship as an adult, which is why becoming a citizen usually involves renouncing another nationality, and a citizen who takes up another citizenship can jeopardise their Singapore status. Confirm the current rules with ICA.

What happens to children with dual nationality?

Children can sometimes hold dual nationality for a period, for example where they acquire Singapore citizenship and another nationality at birth. But the general expectation is a single citizenship as an adult, so a young dual national is usually expected to resolve this by a certain age. Confirm the rules and timing with ICA.

If I become a Singapore citizen, do I lose my other nationality?

Generally you would need to renounce your existing nationality, since Singapore does not allow adults to hold dual citizenship. Renunciation is part of the closing formalities of becoming a citizen. This is a significant, largely irreversible step, so weigh it carefully before pursuing citizenship.

Can a Singaporean take up another citizenship?

Voluntarily acquiring or exercising another citizenship can put a Singapore citizen's status at risk, since it conflicts with the rule against dual citizenship for adults. So it is not something to do quietly. If you are considering another nationality, treat it as a serious decision and confirm the position with ICA.

How do I know if dual nationality is possible for me?

Identify the countries whose nationality is in question and check each one's rules, since both countries' laws matter. For Singapore, adults generally cannot hold dual citizenship. Confirm Singapore's rules with ICA and other countries' rules with their own authorities.