Confederation creates the Dominion of Canada
The British North America Act unites four provinces on 1 July 1867
Quick facts
- Effective date
- 1 July 1867
- Founding provinces
- Ontario, Quebec, Nova Scotia, New Brunswick
- First Prime Minister
- John A. Macdonald
- Renamed
- Constitution Act, 1867 (in 1982)
What happened
After conferences at Charlottetown, Quebec City, and London through the mid-1860s, the British Parliament passed the British North America Act, receiving royal assent on 29 March 1867. It came into effect on 1 July 1867, uniting the Province of Canada (split into Ontario and Quebec), Nova Scotia, and New Brunswick into a single federal dominion called Canada. The Act, drafted largely under the direction of delegates including John A. Macdonald, George-Etienne Cartier, and George Brown, established a federal parliamentary system dividing powers between a central government and provincial legislatures, modelled on British parliamentary government rather than the American republican model. Macdonald became the country's first prime minister.
Why it matters
Confederation created the constitutional and federal framework that every later province joined, and the BNA Act, renamed the Constitution Act, 1867 after 1982, remains the foundational document of Canada's constitution, still defining the division of federal and provincial powers today.
How we know
The BNA Act's text is a public statute of the British Parliament, and Library and Archives Canada holds an original copy annotated by Macdonald; the Canadian Encyclopedia's Constitution Act 1867 and Fathers of Confederation entries summarize its passage and drafting.
Sources
- The Canadian Encyclopedia. Constitution Act, 1867 · Reputable sourcethecanadianencyclopedia.ca · The domain "thecanadianencyclopedia.ca" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- The Canadian Encyclopedia. Fathers of Confederation · Reputable sourcethecanadianencyclopedia.ca · The domain "thecanadianencyclopedia.ca" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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Related timelines
- The British Empire → · Confederation created a self-governing Dominion within the British Empire, one of the first examples of the settler-colony autonomy that later reshaped the empire into the Commonwealth