🇨🇦 Brockville, formerly Elizabethtown, is a city in Eastern Ontario, Canada in the Thousand Islands region. Although it is the seat of the United Counties of Leeds and Grenville, it is politically independent of the county. It is included with Leeds and Grenville for census purposes only. Known as the "City of the 1000 Islands", Brockville is located on the north shore of the Saint Lawrence River. Brockville faces the village of Morristown, New York on the south side of the river.
Brockville is situated on land that was inhabited by the St. Lawrence Iroquoians and later by the Oswegatchie people. Brockville is one of Ontario's oldest communities established by Loyalist settlers and is named after the British general Sir Isaac Brock. Tourist attractions in Brockville include the Brockville Tunnel, Fulford Place, and the Aquatarium.