Brockville is a city in Eastern Ontario, Canada, in the Thousand Islands region. Though it serves as the seat of the United Counties of Leeds and Grenville, Brockville is politically independent and is grouped with Leeds and Grenville for census purposes only.A revitalized downtown area, waterfront open to the public with parks and walking trails, and numerous shopping locations are found throughout the city. The city's architecture consists of many stately mansions and elaborate fountains, carefully preserved as reminders of Canadian history.
Indigenous peoples lived along both sides of the St. Lawrence River for thousands of years. The first people known to have encountered the Europeans in the area were the St. Lawrence Iroquoians, a group distinct from and preceding Iroquois nations of the Haudenosaunee. While the explorer Cartier recorded about 200 words in their Laurentian language, the people disappeared from the area by the late 16th century. The Iroquois by then used the St. Lawrence Valley as a hunting ground.
The community is dominated by the St. Lawrence River and is known as The City of the Thousand Islands. St. Lawrence River tour boats offers scenic trips on the river. The Brockville area is the launching point for some of the best fresh-water wreck diving in the World. Numerous sunken ships have been discovered below the waters of the St. Lawrence and a number of dive operators with fully equipped boats are ready to take divers to these sites.