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A Gazetteer for the United States and Canada
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Welcome to Mount Sinai ...

Mount Sinai is located in Suffolk County<1>.

While we don't have a date for the founding of Mount Sinai, you might consider that their post office opened in 1840.

A typical abbreviation for Mount Sinai: Mt. Sinai

Mount Sinai is 30 feet [9 m] above sea level.<2>.

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

Area Codes for Mount Sinai: 631 & 934<3>

The ZIP code for Mount Sinai: 11766<4>

Communities Also Named Mount Sinai ...

Using our Gazetteer, we found that there are 6 communities that are also named Mount Sinai - they are located in Alabama (2), Indiana, Louisiana, North Carolina and Ohio.

For more information, see our Tidbits & Trivia Page for Mount Sinai.

Communities near Mount Sinai ...

We have created a list of 10 communities that are near Mount Sinai.

  • Bridgeport
    (18 miles [29 km] to the northwest)
    • Bridgeport is located in Fairfield County (CT)
    • Jump to our Gazetteer entry for Bridgeport
    • Population from the 2020 Census: 143,525 people
    • Jump to TripAdvisor's Tourism page for Bridgeport <5>
  • Bridgeport
    (18 miles [29 km] to the northwest)
    • Bridgeport is located in Fairfield County (CT)
    • Jump to our Gazetteer entry for Bridgeport
    • Population from the 2020 Census: 143,525 people
  • Milford
    (19 miles [30.6 km] to the north)
    • Milford is located in New Haven County (CT)
    • Jump to our Gazetteer entry for Milford
    • Population from the 2020 Census: 54,781 people
  • Milford
    (19 miles [30.6 km] to the north)
    • Milford is located in New Haven County (CT)
    • Jump to our Gazetteer entry for Milford
    • Population from the 2020 Census: 53,259 people
    • Jump to TripAdvisor's Tourism page for Milford <5>
  • Stratford
    (18 miles [29 km] to the north)
    • Stratford is located in Fairfield County (CT)
    • Jump to our Gazetteer entry for Stratford
    • Population from the 2020 Census: 51,660 people
  • Mastic Beach
    (15 miles [24.1 km] to the southeast)
  • Patchogue
    (12 miles [19.3 km] to the south)
  • Lake Grove
    (7 miles [11.3 km] to the southwest)
  • Northport
    (16 miles [25.7 km] to the west)
  • Islandia
    (12 miles [19.3 km] to the southwest)

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

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

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

TripAdvisor Tourism Pages for Mount Sinai ...

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

Adding Mount Sinai to Our Gazetteer ...

We originally found mention of Mount Sinai 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 Mount Sinai was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<6>

From that list, the Mount Sinai post office opened in 1840.

For more details, see References and Mentions for Mount Sinai.

Footnotes ...

<1>If you're interested in how the shape of New York's counties, including Suffolk, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Mount Sinai - 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 631 code has been Overlayed with the 934 area code. New phone numbers in the Mount Sinai area will be assigned with one of these codes: 631 or 934. As a result, placing a call in the Mount Sinai 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 Mount Sinai). When looking for a ZIP Code, whether Mount Sinai 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/