Americans in Canada numbered 256,000 as US-born immigrants in the 2021 census, the figure Statistics Canada released Nov. 13, 2025. That count holds only one definition of the group. Widen the lens to everyone born in the United States and the total climbs to roughly 373,000. Each official series answers a slightly different question, and the answers don’t contradict.

The 256,000 captures people born in the United States who landed as immigrants and stayed. Add about 90,000 Canadian citizens by descent who were born in the United States, plus roughly 27,000 non-permanent residents born there, and the full US-born population reaches about 373,000. That spread, from 256,000 to 373,000, isn’t a data error. It’s the difference between counting immigrants and counting everyone born south of the border.

Why one country needs several counts

Canada measures its American residents through more than one records system, and each was built for a separate purpose.

• The census counts heads on a single night.
• Immigration records count admissions over time.
• Citizenship records count grants.

A person can sit inside several of these counts at once or none of them, which is why no single number settles the question of how many Americans in Canada there are.

Place of birth and citizenship pull apart further. The 2021 census found that the United States was the top country of secondary citizenship for Canadian citizens by birth who hold more than one passport, at 18.5%. Those dual nationals are Canadian by birth and American by a second tie. They never show up in the immigrant count at all.

The flow behind the stock

The 256,000 is a stock figure, a snapshot. The flow that feeds it runs through Immigration, Refugees and Citizenship Canada. In the five years before the 2021 census, 39,880 Americans arrived as new immigrants, making the United States the sixth most common birthplace among recent arrivals at 3% of the total. The count has held near 250,000 since 1991, older cohorts replaced as new arrivals land.

That inflow skews settled rather than striving. The median age of the US-born immigrant group was 52.4. Among those of core working age admitted since 1980, 63.4% came through family sponsorship rather than skilled-worker streams. The typical American immigrant in that cohort is joining relatives, not chasing a job offer.

A fourth series opens in 2026

Citizenship grants form their own count, and a law change has just made it the fastest-moving one. Bill C-3 took effect Dec. 15, 2025, ending the rule that blocked Canadian citizenship from passing beyond the first generation born abroad. The change is retroactive. People who qualify are already Canadian citizens under the law; what they file for is a certificate proving it.

Americans moved first and hardest. Nearly 2,500 filed for proof of Canadian citizenship in January 2026 alone, against 290 from the United Kingdom. Across all of 2025, US citizens lodged 24,500 citizenship-by-descent applications, close to 30% of the global total.

The eligible American pool runs into the millions, most of them unaware they qualify. None of those applicants are immigrants, so none will enter the 256,000. They enter a different ledger entirely, the one tracking Americans who acquire a second passport without leaving home.

Which Americans the headline number describes

The count of Americans in Canada has never been a single number. The 256,000 describes one slice: people born in the United States who moved to Canada and took up landed status. It leaves out the dual nationals counted by birthright, the non-permanent residents on work and study permits and the wave now claiming citizenship by descent. Read alone, it undercounts the American footprint by more than 100,000.

That footprint also sits at its historical ceiling. The US-born population in Canada peaked at 374,000 in 1921, then 4.3% of everyone in the country. The same headcount today is 0.70%. Even 373,000 runs low, because the census enumerated 26,805 American-born non-permanent residents, fewer than half the 61,385 who held a valid permit or open claim at some point in 2021.

The right figure depends on the question. For settled American immigrants, 256,000 is the clean answer. For everyone born in the United States and living in Canada, it’s about 373,000. For the broader pull toward Canadian status, the descent filings and Americans filing asylum claims in Canada climbing through 2026 tell more than any census night can. The census fixes a number. The other ledgers show it moving.