The Battle of Lake Erie, sometimes called the Battle of Put-in-Bay, was fought on 10 September 1813, in Lake Erie off the coast of Ohio during the War of 1812. Nine vessels of the United States Navy defeated and captured six vessels of Great Britain's Royal Navy. This ensured American control of the lake for the rest of the war, which in turn allowed the Americans to recover Detroit and win the Battle of the Thames to break the Indian confederation of Tecumseh. It was one of the biggest naval battles of the War of 1812.

When the war broke out, the British immediately seized control of Lake Erie. They already had a small force of warships there: the sloop of war Queen Charlotte and the brig General Hunter. The brig Lady Prevost was under construction and was put into service a few weeks after the outbreak of war. These vessels were controlled by the Provincial Marine, which was a military transport service and not a naval service. Nevertheless, the Americans lacked any counter to the British armed vessels. The only American warship on Lake Erie, the brig USS Adams, was not ready for service at the start of the war, and when the American army of Brigadier General William Hull abandoned its invasion of Canada, the Adams was pinned down in Detroit by the British batteries at Sandwich on the Canadian side of the Detroit River. The British Major-General Isaac Brock used his control of the lake to defeat Hull's army at the Siege of Detroit, by cutting the American supply lines and rapidly transferring himself and some reinforcements to Amherstburg from where they launched a successful landing on the American side of the Detroit River.

Lake Erie ( /ˈɪri/; French: Lac Érié) is the fourth largest lake (by surface area) of the five Great Lakes in North America, and the tenth largest globally. It is the southernmost, shallowest, and smallest by volume of the Great Lakes and therefore also has the shortest average water residence time. It is bounded on the north by the Canadian province of Ontario, on the south by the U.S. states of Ohio, Pennsylvania, and New York, and on the west by the state of Michigan. The lake is named after the Erie tribe of Native Americans who lived along its southern shore. The outflow from the lake provides hydroelectric power to Canada and the U.S. as it spins huge turbines at Niagara Falls.

Lake Erie (42.2° N, 81.2° W) has a mean elevation of 571 feet (174 m) above sea level. It has a surface area of 9,940 square miles (25,745 km²) with a length of 241 miles (388 km) and breadth of 57 miles (92 km) at its widest points.