Alberta has voted overwhelmingly to remain part of Canada, delivering a decisive defeat to the province's separatist movement and a significant boost to national unity.

The referendum result was hailed by Prime Minister Mark Carney as "a clear choice" in favour of the Canadian federation. The margin of the vote — described by observers as overwhelming — exceeded what many federalists had expected in a province where grievances against Ottawa over energy policy, equalisation payments and environmental rules have run deep for years.

A movement stopped, not finished

Alberta separatism grew out of long-standing western alienation: the feeling in Canada's oil heartland that federal policies are written for the populous east and imposed on the west. The campaign for a referendum gathered momentum on the promise that independence — or the credible threat of it — would force a renegotiation of Alberta's place in the federation.

That strategy has now suffered what analysts are calling a huge setback. Leaders of the independence movement have vowed to push on, but the scale of the defeat makes a second vote anytime soon difficult to imagine, and federal officials will read the result as a mandate to move past the question.

What it means

For Canada, the verdict removes — at least for this political cycle — the most serious internal challenge to the federation since Quebec's referendum era. For Alberta's government, attention now returns to the negotiating table: extracting concessions from Ottawa on pipelines, carbon policy and fiscal arrangements, this time without a secession threat in hand.

Markets and investors, who dislike constitutional uncertainty, are likely to welcome the clarity. The separatist movement, meanwhile, faces the hard arithmetic of a clear and public 'no'.