Welcome to Jefferson Island ...

Jefferson Island is located in Madison County<1>.

While we don't have a date for the founding of Jefferson Island, you might consider that their post office opened  in 1912.

A typical abbreviation for Jefferson Island: Jefferson Is. (in Canada, 'Isld.' is the more common abbreviation.)

Jefferson Island is 4,270 feet [1,301 m] above sea level.<2> In other words, the elevation of Jefferson Island is about ¾ mile [or ~1¼ km] above sea level.

Time Zone: Jefferson Island lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time

The area code for Jefferson Island: (406)

Communities Also Named Jefferson Island ...

Using our Gazetteer, we found that there are two Montana communities named Jefferson Island: This one is located in Madison County and the other is located in Jefferson County.

For more information, see our Tidbits & Trivia Page for Jefferson Island.

Communities near Jefferson Island ...

We have created a list of 10 communities that are near Jefferson Island.

• Three Forks
  (18 miles [29 km] to the east)
  • Note: The GPS coordinates that we are using for Three Forks have been provided by the GNIS.<3> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Three Forks
  • Three Forks is located in Gallatin County
  • Population from the 2020 Census: 2,043 people
  • Jump to TripAdvisor's Tourism page for Three Forks <4>
• Whitehall
  (7 miles [11.3 km] to the west)
  • Note: The GPS coordinates that we are using for Whitehall have been provided by the GNIS.<3> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Whitehall
  • Whitehall is located in Jefferson County
  • Population from the 2020 Census: 1,160 people
  • Jump to TripAdvisor's Tourism page for Whitehall <4>
• Piedmont
  (9 miles [14.5 km] to the west)
  • Jump to our Gazetteer entry for Piedmont
  • Piedmont is located in Jefferson County
• Harrison
  (12 miles [19.3 km] to the southeast)
  • Jump to our Gazetteer entry for Harrison
  • Harrison is located in Madison County
  • Jump to TripAdvisor's Tourism page for Harrison <4>
• Strawberry ‑ Historic
  (12 miles [19.3 km] to the south)
  • Note: We haven't been able to verify our GPS coordinates for Strawberry. Although the coordinates have been estimated, they should be in the vicinity.<5>
  • Jump to our Gazetteer entry for Strawberry
  • Strawberry is located in Madison County
• Mammoth
  (13 miles [20.9 km] to the south)
  • Jump to our Gazetteer entry for Mammoth
  • Mammoth is located in Madison County
• Pony ‑ Historic
  (13 miles [20.9 km] to the south)
  • Jump to our Gazetteer entry for Pony
  • Pony is located in Madison County
  • Jump to TripAdvisor's Tourism page for Pony <4>
• Pipestone Hot Springs
  (14 miles [22.5 km] to the west)
  • Jump to our Gazetteer entry for Pipestone Hot Springs
  • Pipestone Hot Springs is located in Jefferson County
• Willow Creek
  (14 miles [22.5 km] to the east)
  • Jump to our Gazetteer entry for Willow Creek
  • Willow Creek is located in Gallatin County
  • Jump to TripAdvisor's Tourism page for Willow Creek <4>
• Silver Star
  (19 miles [30.6 km] to the southwest)
  • Jump to our Gazetteer entry for Silver Star
  • Silver Star is located in Madison County
  • Jump to TripAdvisor's Tourism page for Silver Star <4>

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

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

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

TripAdvisor Tourism Pages for Jefferson Island ...

Looking for more information about Jefferson Island? 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.

While we are unaware of a Tourism page that is specific to Jefferson Island, there are neighboring communities that do have Tourism pages. A map of those communities can be found with our TripAdvisor Page for Jefferson Island.

Adding Jefferson Island to Our Gazetteer ...

We originally found mention of Jefferson Island 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 Jefferson Island was in the book titled Business Atlas and Shippers' Guide (1895).

We also found Jefferson Island in the book titled .<6> From that list, the Jefferson Island post office opened in 1912.

For more details, see References and Mentions for Jefferson Island.

Off-the-Road Links ...

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

The official website for State of Montana: https://mt.gov/