Most of Canada’s auto industry is centred in Southern Ontario, which makes sense due to it’s proximity to Michigan, the (well, former) centre of the American auto industry. There are a few cars though that were built outside of Ontario.
Volvo had a plant in Halifax from 1963 to 1998. Volvo even called the Amazon the Canadian in Canada to celebrate it’s Canadian origin. The plant was the first foreign auto plant in North America, before the onslaught of Toyota, Honda, and Hyundai plants that now dot the landscape of North America.
There was also the Bricklin SV-1, which, like the Volvos built in Halifax, was built in the Maritimes. This time however, Saint John, New Brunswick (Not to be confused with St. John’s, Newfoundland and Labrador) is where it was built.
There’s the Campagna T-Rex, which is kindof a car. Built in Boucherville, Quebec, a suburb of Montreal.
There’s also the equally Quebecois HTT Plethoré. Built in Saint-Eustache, just across the border from Ontario.
Last but not least, the fourth and final gen F-Body Trans Am and Camaro, built in Sainte-Thérèse, Quebec. There are others, but these are the most notable ones.