Kingston, city (1991 pop. 56,597), S Ont., Canada, on Lake Ontario, near the head of the St. Lawrence River and at the end of Rideau Canal from Ottawa. Kingston has probably the best harbor on the lake. Industries include the manufacture of locomotives, ships, mining equipment, textiles, aluminum products, synthetic yarn, and ceramics.
On the site stood Fort Frontenac, which was of great importance in the French and Indian War. The present city was founded by United Empire Loyalists in 1783 and prospered during the War of 1812 as the Canadian naval base for operations against the Americans. From 1841 to 1844 it served as the capital of Canada. Fort Henry, built during the War of 1812 and rebuilt from 1832 to 1836, is now a museum. Kingston is the seat of Queen's Univ. (1841), of the Royal Military College, of a campus of St. Lawrence College, and of Anglican and Roman Catholic bishoprics and cathedrals.