RoadsideThoughts
A Gazetteer for the United States and Canada
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Welcome to Thermopolis ...

The town of Thermopolis is located in Hot Springs County<1> and is the County Seat for Hot Springs County.

While we don't have a date for the founding of Thermopolis, you might consider that their post office opened in 1895.

From the  Census Estimates for 2019, Thermopolis has a population of 2,763 people<2> (see below for details).

Thermopolis is 4,330 feet [1,320 m] above sea level.<3> In other words, the altitude of Thermopolis is about ¾ mile [or ~1¼ km] above sea level.

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

Area Code for Thermopolis: 307

The ZIP code for Thermopolis: 82443<4>

Population Details ...

Taken from the 2019 Census Estimates, Thermopolis had an population of 2,763 people. This is a decrease of 8.18% since the 2010 Census (or a decrease of 12.89% since the 2000 Census).

At the time of the 2010 Census, Thermopolis had a population of 3,009 people (or 62.54% of the total population of Hot Springs County). This makes Thermopolis the county's most populous community.

The population of Thermopolis represents 0.53% of the total population of Wyoming (which has 563,626 people), making it the state's 22nd most populous community.

With a 2010 count of 3,009 people, the population of Thermopolis decreased 5.14% from the 2000 Census (which had a count of 3,172 people).

More information can be found on the Census Page for Thermopolis.

Communities near Thermopolis ...

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

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

We have a detailed list of newspapers that have been published in the area around Thermopolis. Our list includes 14 papers. See our Newspapers Page for Thermopolis.

TripAdvisor Tourism Pages for Thermopolis ...

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

Adding Thermopolis to Our Gazetteer ...

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

From that list, the Thermopolis post office opened in 1895.

For more details, see References and Mentions for Thermopolis.

Footnotes ...

<1>If you're interested in how the shape of Wyoming's counties, including Hot Springs, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Thermopolis.
<3>The elevation is an estimate for the area around Thermopolis - it will be higher in some places and lower in others.
<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 town (such as Thermopolis). When looking for a ZIP Code, whether Thermopolis 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/