Cape Vincent is a town in Jefferson County, New York, United States. The population was 2,777 at the 2010 census.The town is in the northwest part of the county. In the town is a village also called Cape Vincent. Both town and village are northwest of Watertown. The town was first explored in the 17th century by French explorers and missionaries. At that time it was home to the Onondaga people. Modern settlement began in 1801 at Millens Bay. During the War of 1812, Cape Vincent was an armed camp to oppose the British forces in adjacent Kingston, Ontario. The town was formed in 1849 from the north part of the town of Lyme. In 1895, the hamlet of Cape Vincent incorporated as a village. By that time, the region was becoming a famous tourist area due to the Thousand Islands.
According to the United States Census Bureau, the town has a total area of 89.8 square miles (232.7 km2), of which 56.4 square miles (146.0 km2) are land and 33.5 square miles (86.8 km2), or 37.28%, are water. The northwest border of the town is the St. Lawrence River, and the western border is Lake Ontario. Much of the town is on a peninsula projecting into Lake Ontario, where the lake enters the river. The south part of the peninsula is in the neighboring town of Lyme. Facing the town across the St. Lawrence River is Wolfe Island, the largest of the Thousand Islands. The island is in Frontenac County, Ontario, Canada. New York State Route 12E runs along the St. Lawrence River before it turns southeast at Cape Vincent village.
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