Canadian Citizenship by Descent for Americans: How U.S. Citizens Can Claim Dual Citizenship Under Bill C-3

If your parent, grandparent, or great-grandparent was born in Canada, you may already be a Canadian citizen. Canada’s new citizenship law — Bill C-3, An Act to amend the Citizenship Act — has permanently removed the first-generation limit that previously prevented Canadian citizenship from passing beyond one generation born outside Canada. For Americans with Canadian ancestry, the implications are enormous.

Millions of Americans have Canadian roots. The historical ties between the two countries run deep: waves of Canadian emigration to the United States occurred throughout the 19th and 20th centuries, including large numbers of French Canadians who settled in New England, Maritimers who moved to the Boston area, and families from across the Canadian provinces who relocated for work in cities like Detroit, Buffalo, Seattle, and beyond.

Until now, many of these families were cut off from Canadian citizenship by rules that were rigid, arbitrary, and often discriminatory. Bill C-3 has changed that. Many of these individuals are part of a group known as “Lost Canadians” — people with legitimate Canadian ancestry whose citizenship was never recognized or was stripped away by outdated laws. If you are an American with a Canadian parent, grandparent, great-grandparent, or even more distant Canadian ancestor, you may already qualify for Canadian citizenship by descent — and you may have been a Canadian citizen your entire life without knowing it.

What Bill C-3 Changed and Why It Affects U.S. Citizens

Since 2009, Canadian law imposed what was known as the first-generation limit: only the first generation born outside Canada to a Canadian parent could inherit citizenship. If your parent was born in Canada, you were Canadian. But if your parent was also born outside Canada — even if their parent (your grandparent) was born in Canada — citizenship could not pass to you.

This rule created a class of people known as “Lost Canadians” — individuals who had Canadian ancestry and should have been citizens, but were excluded by the generational cutoff. Courts found this limit to be unconstitutional, and Bill C-3 was enacted to correct the problem.

Under the new law, citizenship now flows through multiple generations for anyone born before the law came into force. There is no generational limit for past births. If you can trace an unbroken line of descent to a Canadian citizen — whether that is your parent, grandparent, great-grandparent, or even further back — you may now be recognized as a Canadian citizen at birth.

For full details on how Bill C-3 operates, including the retroactive provisions and the new substantial connection requirement for future births, see our complete guide to claiming Canadian citizenship by descent under Bill C-3.

Do You Qualify? Eligibility for Americans

You may qualify for Canadian citizenship by descent if any of the following apply to your family:

• A parent was born in Canada — This is the most straightforward case. You are likely already a Canadian citizen.
• A grandparent was born in Canada — Under the old rules, you would typically have been excluded by the first-generation limit. Under Bill C-3, your parent’s citizenship is retroactively recognized, and your citizenship flows from that.
• A great-grandparent (or more distant ancestor) was born in Canada — Bill C-3 allows citizenship to cascade through multiple generations. Each ancestor in the chain is retroactively recognized as a citizen, allowing your claim to connect back to the original Canadian.
• Your family lost citizenship under older laws — Many Canadian families — often called Lost Canadians — lost citizenship due to discriminatory rules around gender, marriage, or the old “retention requirement” that required people born abroad to apply to keep their citizenship before age 28.

How Citizenship Flows Through Generations

Under Bill C-3’s retroactive provisions, citizenship cascades down the family tree. The law sequentially recognizes each generation, starting from the original Canadian citizen:

This holds true even if your parents, grandparents, or other ancestors never claimed or applied for Canadian citizenship during their lifetimes. What matters is whether they would have been citizens under the law. Bill C-3 corrects the record retroactively.

U.S.-Canada Dual Citizenship: What Americans Need to Know

Both the United States and Canada recognize dual citizenship. Claiming Canadian citizenship by descent will not affect your U.S. citizenship. You do not have to renounce one to hold the other.

As a dual U.S.-Canada citizen, you would have the right to:

• Live and work in Canada without a visa or work permit, with full access to the Canadian labour market
• Access Canada’s public healthcare system once you establish residency in a province
• Hold a Canadian passport, which provides visa-free travel to over 180 countries
• Vote in Canadian elections and participate fully in Canadian civic life
• Sponsor family members for immigration to Canada, including a spouse or common-law partner
• Access Canadian education at domestic tuition rates for yourself or your children
• Pass citizenship to your children, subject to the new substantial connection requirement for children born after Bill C-3 came into force

Dual citizenship also offers a form of geographic diversification. In an era of increasing political and economic uncertainty, having legal status in two of the world’s most stable democracies provides options and security for you and your family.

Tax and Financial Considerations for Dual Citizens

One of the most common questions Americans have about dual citizenship relates to taxes. Here is what you need to understand:

U.S. tax obligations continue. The United States taxes its citizens on worldwide income regardless of where they live. Claiming Canadian citizenship does not change this. If you continue to live in the United States, your U.S. tax situation remains essentially the same.

Canada does not tax non-residents on worldwide income. If you become a Canadian citizen but continue to reside in the United States, Canada generally will not tax you on your U.S. or worldwide income. Canadian tax obligations arise primarily from residency, not citizenship. This is a key difference from the U.S. system.

If you move to Canada, you will be subject to Canadian income tax as a resident. The Canada-U.S. Tax Treaty provides mechanisms to avoid double taxation, including foreign tax credits. However, the interaction between the two tax systems can be complex, particularly for individuals with investment income, retirement accounts (such as 401(k)s and IRAs), or business interests.

Documents American Applicants Will Need

The documentary requirements for citizenship by descent are substantial, and this is where many applications become complex. For each generation in the chain, you will typically need to provide:

• Birth certificates for every person in the generational chain, from the Canadian ancestor down to you
• Marriage certificates where names changed or to establish relationships between generations
• Immigration and naturalization records for the Canadian ancestor, if they were not born in Canada
• Death certificates, particularly where an ancestor passed away before ever claiming citizenship
• Canadian census records or other historical documents to establish that the ancestor was resident in Canada and transitioned into citizenship in 1947
• Your valid U.S. passport or other identity documents

Canada has an extensive historical record-keeping tradition dating back to the 1800s, including federal censuses, immigration arrival records, military service files, and provincial vital statistics. Many of these records are accessible through Library and Archives Canada and provincial archives, and can be invaluable in building a claim.

Common Scenarios for American Applicants

“My grandfather was born in Canada and moved to the U.S.”

This is the most common scenario we see from American applicants. Your grandfather (Generation 1) was born in Canada and became a Canadian citizen. He emigrated to the United States, where your parent (Generation 2) was born. You (Generation 3) were born in the U.S. Under the old first-generation limit, your parent was Canadian but you were not. Under Bill C-3, both your parent and you are now retroactively recognized as Canadian citizens.

“My great-grandparents were French Canadian and came to New England.”

This is extremely common among families in Maine, Vermont, New Hampshire, Massachusetts, Connecticut, and Rhode Island. Large numbers of French Canadians emigrated to New England in the late 1800s and early 1900s. If your great-grandparent was born in Canada (or was present in Canada as a British subject and became a citizen on January 1, 1947), Bill C-3 may restore citizenship through the entire chain down to you — through your grandparent, your parent, and to you.

“My grandmother lost her citizenship because she married an American.”

Under Canada’s older citizenship and nationality laws, women could lose their status if they married a foreign national. Bill C-3 addresses many of these historical gender-based injustices. If your grandmother was a Canadian citizen who lost her status through marriage, she may now be retroactively recognized as having remained a citizen, which would restore the chain to you.

“My parent was born in Canada but I was born in the U.S. — am I already Canadian?”

Very likely, yes. If your parent was born in Canada, you almost certainly acquired Canadian citizenship at birth, even under the pre-Bill C-3 rules. The first-generation limit only cut off the second generation born abroad. You should apply for proof of citizenship if you have not already done so.

“Can Cajuns or Acadians claim Canadian citizenship?”

This is a question that comes up frequently. The Acadian expulsion occurred in the mid-1700s — well before Canada created its own citizenship in 1947. For most Cajun families, the ancestral connection to Canada predates Canadian citizenship itself, which means there is no Canadian citizen ancestor in the chain. However, every family’s circumstances are different. If any ancestor in your family line was present in Canada and became a Canadian citizen in 1947 or later, there may be a path.

Frequently Asked Questions: Canadian Citizenship by Descent for Americans

Related Pages

• How to Claim Canadian Citizenship by Descent Under Bill C-3 — Complete Guide
• Bill C-3: Canada Confirms Major Change to Citizenship by Descent
• How to Apply for Canadian Citizenship: Step-by-Step Guide
• Who Qualifies for Canadian Citizenship?
• Benefits of Canadian Citizenship
• Book a Consultation with an Immigration Lawyer