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Welcome to Henderson Harbor ...

Henderson Harbor is located in the Thousand Islands/Saint Lawrence River/Seaway region.

Henderson Harbor is located in Jefferson County<1>.

While we don't have a date for the founding of Henderson Harbor, you might consider that their post office opened in 1889.

A typical abbreviation for Henderson Harbor: Henderson Hbr. (or less commonly used: Henderson Harb. or Henderson Hrbr.)

Henderson Harbor is 240 feet [73 m] above sea level.<2>.

Time Zone: Henderson Harbor lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time

Area Codes for Henderson Harbor: 315 & 680<3>

The ZIP code for Henderson Harbor: 13651<4>

Communities near Henderson Harbor ...

We have created a list of 10 communities that are near Henderson Harbor.

  • Watertown
    (16 miles [25.7 km] to the northeast)
  • Adams
    (9 miles [14.5 km] to the southeast)
    • Adams is located in Jefferson County
    • Jump to our Gazetteer entry for Adams
    • Population from the 2020 Census: 1,687 people
    • Jump to TripAdvisor's Tourism page for Adams <5>
  • Sackets Harbor
    (6 miles [9.7 km] to the northeast)
  • Brownville
    (14 miles [22.5 km] to the northeast)
  • Dexter
    (12 miles [19.3 km] to the northeast)
  • Sandy Creek
    (16 miles [25.7 km] to the south)
  • Cape Vincent
    (19 miles [30.6 km] to the north)
  • Chaumont
    (14 miles [22.5 km] to the north)
  • Lacona
    (16 miles [25.7 km] to the southeast)
  • Glen Park
    (15 miles [24.1 km] to the northeast)
    • Glen Park is located in Jefferson County
    • Jump to our Gazetteer entry for Glen Park
    • Population from the 2020 Census: 462 people

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 Henderson Harbor. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Henderson Harbor.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Henderson Harbor. 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 Henderson Harbor.

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

TripAdvisor Tourism Pages for Henderson Harbor ...

Looking for more information about Henderson Harbor? 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 Henderson Harbor, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Henderson Harbor.

Adding Henderson Harbor to Our Gazetteer ...

We originally found mention of Henderson Harbor 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 (so far) for Henderson Harbor was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<6>

From that list, the Henderson Harbor post office opened in 1889.

For more details, see References and Mentions for Henderson Harbor.

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 Henderson Harbor - 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 Henderson Harbor area will be assigned with one of these codes: 315 or 680. As a result, placing a call in the Henderson Harbor 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 Henderson Harbor). When looking for a ZIP Code, whether Henderson Harbor 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>A copy of the Blevins & Helbock Post Office list with background information can be found at:

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