Three Mile Bay, New York
Census-designated place
Three Mile Bay Show map of New York Three Mile Bay Show map of the United States
Coordinates: 44°4′53″N 76°11′54″W / 44.08139°N 76.19833°W / 44.08139; -76.19833
Country	United States
State	New York
County	Jefferson
Town	Lyme
Area [1]
• Total	0.30 sq mi (0.77 km2)
• Land	0.28 sq mi (0.73 km2)
• Water	0.01 sq mi (0.03 km2)
Elevation	259 ft (79 m)
Population  (2020)
• Total	187
• Density	660.78/sq mi (255.23/km2)
Time zone	UTC-5 (Eastern (EST))
• Summer (DST)	UTC-4 (EDT)
ZIP code	13693
Area code	315
GNIS feature ID	967455
FIPS code	36-73737

Three Mile Bay is a hamlet and census-designated place (CDP) in the town of Lyme in Jefferson County, New York, United States. The elevation is 259 feet (79 m).^[2] As of the 2010 census it had a population of 227.^[3]

The hamlet has its own post office, a volunteer fire company, and boat launches for fishing and recreation in the various outlying bays that draw from Lake Ontario and the St. Lawrence seaway.

History

The community was settled between 1810 and 1820. Early resident Asa Wilcox built 48 brigs, propellers, schooners, and other seafaring vessels from 1835 to 1853. Some of these vessels, like the A.E. Vickery, ultimately joined the more than 500 shipwrecked vessels now resting at the bottom of the St. Lawrence River and Lake Ontario.^[4][5]

Geography

Three Mile Bay is in western Jefferson County, at the head of a bay of the same name, an inlet to Chaumont Bay of Lake Ontario. The community is in the western part of the town of Lyme along New York State Route 12E, which leads northwest 8 miles (13 km) to Cape Vincent on the St. Lawrence River and southeast 17 miles (27 km) to Watertown, the Jefferson county seat.

According to the U.S. Census Bureau, the Three Mile Bay CDP has an area of 0.26 square miles (0.67 km²), all land.^[3]

Demographics