Cornwall, ON, incorporated as a city in 1945, population 46,340 (2011c), 45,965 (2006c).
Cornwall, ON, incorporated as a city in 1945, population 46,340 (2011c), 45,965 (2006c). The City of Cornwall, seat of the counties of Stormont, Dundas and Glengarry, is located on the St Lawrence River, 110 km southwest of Montréal. Founded in 1784 as a Loyalist settlement by veterans of Sir John Johnson's regiment, it was called New Johnstown and renamed Cornwall for the Prince of Wales (also duke of Cornwall) by the 1790s. A regional administrative centre, it was also an important transshipment point until completion of the upper St Lawrence canals in the 1840s and the Grand Trunk Railway in 1856. In the 1870s and 1880s several textile and paper mills located here, revitalizing the community and drawing a large French-speaking work force from Québec.