Fort York is an early 19th-century military fortification in the Fort York neighbourhood of Toronto, Ontario, Canada. The fort was used to house members of the British and Canadian militaries, and to defend the entrance of the Toronto Harbour. The fort features stone-lined earthwork walls and eight historical buildings within them, including two blockhouses. The fort forms a part of Fort York National Historic Site, a 16.6-hectare site that includes the fort, Garrison Common, military cemeteries, and a visitor centre.
The fort originated from a garrison established by John Graves Simcoe in 1793. Anglo-American tensions resulted in the fort to be further fortified, and designated as an official British Army post in 1798. The original fort was destroyed by American forces following the Battle of York in April 1813. Work to rebuild the fort began later in 1813 over the remains of the old fort, and was completed in 1815. The rebuilt fort served as a military hospital for the remainder of the War of 1812, although it briefly saw action against an American naval vessel in August 1814.