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The Commemorative
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The Commemorative Quarter for New York





Welcome to Three Mile Bay ...

Three Mile Bay is located in the Thousand Islands and Saint Lawrence River/Seaway region.

Three Mile Bay is located in Jefferson County<1>.

While we don't have a date for the founding of Three Mile Bay, you might consider that their post office opened  in 1830.

Three Mile Bay is 250 feet [76 m] above sea level.<2>.

Time Zone: Three Mile Bay lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time

Area Codes for Three Mile Bay: 315 & 680<3>

The ZIP code for Three Mile Bay: 13693<4>

Communities near Three Mile Bay ...

We have created a list of 10 communities that are near Three Mile Bay.

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Three Mile Bay. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Three Mile Bay.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Three Mile Bay. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Three Mile Bay.

We also have a detailed list of newspapers that have been published in the area around Three Mile Bay. See our Newspapers Page for Three Mile Bay.

TripAdvisor Tourism Pages for Three Mile Bay ...

Looking for more information about Three Mile Bay? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

In addition to the Tourism page for Three Mile Bay, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Three Mile Bay.

Adding Three Mile Bay to Our Gazetteer ...

We originally found mention of Three Mile Bay in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found for Three Mile Bay was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<7>

X2X - From that list, the Three Mile Bay post office opened in 1830.

We also found Three Mile Bay in the book titled U.S. Post Offices (Oct. 1846).

For more details, see References and Mentions for Three Mile Bay.

Unfortunately, we don't know of a website for Three Mile Bay. If you can help, please contact us through our Feedback Page.

The official website for Jefferson County: www.co.jefferson.ny.us/

The official website for State of New York: https://www.ny.gov/

Footnotes ...

<1>If you're interested in how the shape of New York's counties, including Jefferson, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Three Mile Bay - it will be higher in some places and lower in others.
<3>When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 315 code has been Overlayed with the 680 area code. New phone numbers in the Three Mile Bay area will be assigned with one of these codes: 315 or 680. As a result, placing a call in the Three Mile Bay area will require 10-digit dialing (where you enter both the area code and then the phone number).
<4>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a community (such as Three Mile Bay). When looking for a ZIP Code, whether Three Mile Bay or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<5>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<6>The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required.
<7>A copy of their list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/




 

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This page was last modified/updated: 15 Jul 2025