Three Mile Bay
Census-designated place in Jefferson County, New York

Three Mile Bay is an unincorporated community (census-designated place) in Jefferson County, New York, with 187 residents (2020 Census). It sits at 259 ft (79 m) above sea level. The nearest town is Chaumont, 3.4 miles E.
- 187residents (2020 Census)
- 259 ftelevation · 79 m
- 0.3 sq miland area · 0.7 km²
- 661 / sq mipopulation density
- 13622ZIP code
About Three Mile Bay
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). As of the 2020 census, Three Mile Bay had a population of 187.
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.
Text: Wikipedia · CC BY-SA 4.0
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Living in Three Mile Bay
- Median household income
- $34,464
- Median home value
- $205,800
- Median age
- 41.5
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Map of Three Mile Bay
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Open in Google Maps ›Three Mile Bay, NY population
Three Mile Bay had 187 residents in the 2020 Census.
| 2020 Census | 187 |
|---|---|
| Density | 661 per sq mi (255 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Three Mile Bay at a glance
| State | New York (NY) |
|---|---|
| County | Jefferson County |
| Type | Census-designated place |
| Population | 187 (2020) |
| Land area | 0.28 sq mi (0.7 km²) |
| Water area | 0.01 sq mi (0.03 km²) |
| Elevation | 259 ft (79 m) |
| Coordinates | 44.0861° N, 76.1967° W |
| ZIP code | 13622 |
| Census code (GEOID) | 3673737 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Three Mile Bay
- Chaumont3.4 mi E
- Cape Vincent7.1 mi W
- Depauville8.5 mi NE
- Dexter9.3 mi SE
- Sackets Harbor11.0 mi SE
- Clayton11.9 mi NE
- Brownville12.0 mi SE
- Glen Park13.2 mi SE
- La Fargeville14.1 mi NE
- Pamelia Center15.0 mi E
- Thousand Island Park16.2 mi NE
- Watertown16.2 mi SE
Straight-line distance between town centers.
Frequently asked questions about Three Mile Bay
What county is Three Mile Bay in?
Three Mile Bay is in Jefferson County, New York.
What is the population of Three Mile Bay, NY?
187 people lived in Three Mile Bay at the 2020 Census.
What is the ZIP code of Three Mile Bay, NY?
The ZIP code of Three Mile Bay is 13622.
What is the elevation of Three Mile Bay?
259 feet (79 m) above sea level.
What towns are near Three Mile Bay?
Chaumont (3.4 mi), Cape Vincent (7.1 mi), Depauville (8.5 mi), Dexter (9.3 mi), Sackets Harbor (11.0 mi).
Last updated: