How to Get Dual Citizenship in Canada and the US

How to Get Dual Citizenship in Canada and the US: A Complete Guide

Holding citizenship in both Canada and the United States is not just possible. For many people, it is already a reality they do not realize they have. Others need to go through a deliberate process to get there. Either way, the rules are specific, and the path you take depends almost entirely on your personal circumstances.

Both countries permit dual citizenship. Neither the US nor Canada requires you to give up your existing citizenship when you naturalize in the other. That makes this particular combination more accessible than many people assume, though the process still takes time and preparation. At Ansari Immigration Law, we help clients understand exactly where they stand and what steps come next.

Does the US Allow Dual Citizenship With Canada?

Yes, and so does Canada. Neither country’s law prohibits their citizens from holding citizenship in the other simultaneously. A dual US-Canadian citizen owes allegiance to both countries, must use a US passport to enter and exit the United States, and does not have to choose one nationality over the other.

That said, not every country in the world takes this position. Some countries require their citizens to renounce foreign citizenship before naturalizing abroad, or automatically strip citizenship when a person takes on another nationality.

If you are also considering citizenship in a third country alongside the US and Canada, you will need to check that country’s rules separately through its embassy or consulate.

Three Ways to Hold Both US and Canadian Citizenship

1. Born in Canada to at Least One US Citizen Parent

Canada grants citizenship to everyone born on its soil. The US, under current law, grants citizenship to children born abroad who have at least one US citizen parent, provided that parent meets certain requirements around prior residence or physical presence in the United States.

The exact rules depend on whether one or both parents are US citizens.

If both parents are US citizens and at least one had a “residence” in the US at some point, the child born in Canada automatically acquires dual citizenship at birth. Residence, under US immigration law, means the person’s principal dwelling place, not simply a visit or a temporary stay.

If only one parent is a US citizen and the other is a foreign national, the US citizen parent must have spent at least one year physically present in the United States before the child’s birth. Physical presence is calculated differently from residence. It counts actual time spent in the country, including visits, not just periods of established living.

Children born out of wedlock in Canada may also acquire dual citizenship at birth, though separate rules apply depending on whether the US citizen is the mother or the father.

Proof of Canadian citizenship in these cases comes from the child’s Canadian birth certificate. Proof of US citizenship can be obtained through a US consulate abroad or upon returning to the United States.

2. Born in the United States to at Least One Canadian Parent

The United States grants citizenship to children born on its territory regardless of the parents’ nationality. Canada generally grants citizenship to children born abroad if at least one parent is a Canadian citizen, and recent changes under Bill C-3 (effective December 15, 2025) have expanded who qualifies by removing the previous limit that restricted citizenship transmission to the first generation born outside Canada.

If you were born in the US to a Canadian parent, there is a strong possibility you already hold dual citizenship and simply need to confirm it by applying for a Canadian citizenship certificate. Your US birth certificate covers proof of US citizenship.

3. Naturalizing as an Adult in Either Country

If none of the above birthright situations apply, the path to dual citizenship runs through naturalisation. You must first become a permanent resident of the country where you are not yet a citizen, spend a qualifying period of time physically present there, then apply for citizenship.

Both the US and Canada follow similar general requirements before granting citizenship through naturalisation:

• Obtain permanent residency first
• Meet the physical presence requirement in that country
• Submit a citizenship application
• Pass a citizenship test
• Pass a language competency assessment
• Have filed taxes in that country during the required period

In the United States, the standard requirement for naturalisation is five years as a lawful permanent resident (green card holder), with at least 30 months of physical presence in the US during that period. In Canada, you need to have been physically present for at least 1,095 days within the five years before applying for citizenship.

This path takes years. But it is entirely achievable with the right groundwork, and holding dual citizenship at the end of it carries real advantages that make the process worthwhile for many people.

Derived US Citizenship for Children Born in Canada

There is a fourth route worth knowing about, less common but significant for some families.

If a child was born in Canada to two non-US citizen parents, and one of those parents later naturalizes as a US citizen while the child is still under 18 and living in the US as a permanent resident, the child may automatically derive US citizenship. Because the child was already a Canadian citizen by birth, they become a dual citizen the moment all the conditions are satisfied.

Did You Become a US Citizen Automatically Before 18

This is not automatic in the obvious sense. All three conditions (the parent’s naturalisation, the child’s green card status, and the child living with the naturalized parent in the US) must be met simultaneously before the child turns 18. If that happened in your family and you were not aware of it, you may already be a US citizen.

To confirm this status, a Form N-600 (Application for Certificate of Citizenship) can be filed with US Citizenship and Immigration Services. A Canadian birth certificate serves as proof of Canadian citizenship in this process.

One Important Distinction

Canada does not have an equivalent rule. If a child is born in the United States and their parents later naturalize as Canadian citizens, that does not make the child Canadian. Canadian citizenship does not flow back to children through a parent’s post-birth naturalisation in the same way.

Why People Pursue Dual US-Canadian Citizenship

The reasons vary, but a few come up consistently. Permanent residents of the United States who spend extended periods abroad risk being found to have “abandoned” their US residency. Citizens face no such risk. Dual citizenship removes the pressure to limit time outside the US in order to protect immigration status, which matters enormously for people with family or business ties in Canada.

Only US citizens can vote in federal and most state elections. Some long-term permanent residents who have built their lives in the US pursue naturalisation specifically because they want a voice in elections, while still keeping their Canadian citizenship.

For Canadians living in the US who want to return to Canada one day, or who travel frequently between both countries, holding both passports eliminates the entry and status questions that otherwise follow you at every border crossing.

Which Passport Do You Use and When

This question confuses a lot of dual citizens. The short answer is that you use your US passport to enter and exit the United States, and your Canadian passport to enter and exit Canada. US law requires US citizens to use a US passport when entering the country.

A US Certificate of Citizenship or Certificate of Naturalisation proves your citizenship status but does not serve as a travel document. You still need a US passport to board international flights to the US. Similarly, a Canadian citizenship certificate alone is not sufficient for international travel. You need a Canadian passport, and you will also need a government-issued photo ID to confirm your identity alongside it.

If you hold both passports and travel between the two countries regularly, keeping both valid and up to date avoids complications at either border.

8 Common Mistakes That Slow Down the Process

Dual citizenship and US citizenship confirmation cases often face delays not because eligibility is missing, but because small, avoidable errors weaken the application or slow down verification. These issues usually appear during document review or eligibility assessment and can significantly extend processing time if not addressed early.

1. Missing Key Documents: Applicants often fail to include complete travel, residence, and identity records needed to establish continuous physical presence history clearly.
2. Weak Travel Proof: Many cases lack consistent entry and exit records, making it difficult for officers to verify actual time spent in each country accurately.
3. Incomplete Tax Records: Missing or partial tax filings create gaps in financial history, which are often required to support residency and citizenship claims properly.
4. Misreading Residency Rules: Applicants confuse legal definitions of residence and physical presence, leading to incorrect assumptions about eligibility under US immigration law standards.
5. Late Citizenship Awareness: Many families discover eligibility only after the child turns 18, missing the strict legal window required for derivative citizenship claims.
6. Poor Record Organisation: Submitting unstructured or scattered documents slows review time because officers must manually piece together fragmented immigration and residency evidence.
7. Incorrect form Selection: Choosing the wrong application type, such as N-400 instead of N-600, often leads to rejection or unnecessary delays in processing.
8. Missing Relationship Proof: Failure to clearly document parent-child legal relationships can delay confirmation of citizenship eligibility across cross-border family cases significantly.

Have Questions About Your Dual Citizenship Eligibility?

Before you assume you do not qualify or spend months gathering documents for a path that does not apply to your situation, get a clear answer first. Ansari Immigration Law works through exactly these questions with clients, from confirming whether dual citizenship already exists to building the application strategy for those who need to naturalize.

Book a consultation with Yameena Ansari and our team to clearly understand your current position and make informed decisions before taking your next step.

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