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A Gazetteer for the United States and Canada
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Welcome to Eureka ...

The city of Eureka is located in Greenwood County<1> and is the County Seat for Greenwood County.

While we don't have a date for the founding of Eureka, you might consider that their post office opened in 1858.

When the people of Eureka refer to themselves (known as a demonym), they frequently use Eurekan<2>

From the  Census Estimates for 2019, Eureka has a population of 2,354 people<3> (see below for details).

Eureka is 1,080 feet [329 m] above sea level.<4>.

Time Zone: Eureka lies in the Central Time Zone (CST/CDT) and observes daylight saving time

Area Code for Eureka: 620

The ZIP code for Eureka: 67045<5>

Population Details ...

Taken from the 2019 Census Estimates, Eureka had an population of 2,354 people. This is a decrease of 10.6% since the 2010 Census (or a decrease of 19.22% since the 2000 Census).

At the time of the 2010 Census, Eureka had a population of 2,633 people (or 39.42% of the total population of Greenwood County). This makes Eureka the county's most populous community.

The population of Eureka represents 0.09% of the population of Kansas (which has 2,853,118 people), making it the state's 98th most populous community.

With a 2010 count of 2,633 people, the population of Eureka decreased 9.64% from the 2000 Census (which had a count of 2,914 people).

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

Communities Also Named Eureka ...

While we believe that this Eureka is located in Greenwood County, we know of another 5 Kansas communities named Eureka. Those communities are located in the following counties: Brown, Cowley, Jackson, Osage and Saline County.

Beyond Kansas, there are 68 communities that are also named Eureka - they are located in Alabama (2), Alaska (2), California (2), Colorado, Florida (2), Georgia (3), Illinois, Indiana (3), Iowa (3), Kentucky, Louisiana, Maine, Michigan (2), Minnesota, Mississippi, Missouri (4), Montana (2), Nebraska, Nevada (2), New York, North Carolina, Nova Scotia, Nunavut, Ohio (2), Oklahoma, Ontario, Pennsylvania (2), South Carolina (2), South Dakota, Tennessee (4), Texas (5), Utah, Virginia, Washington (2), West Virginia and Wisconsin.

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

Communities near Eureka ...

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

  • Toronto
    (18 miles [29 km] to the east)
  • Hamilton
    (12 miles [19.3 km] to the northeast)
  • Severy
    (14 miles [22.5 km] to the south)
    • Severy is located in Greenwood County
    • Jump to our Gazetteer entry for Severy
    • Population from the 2020 Census: 224 people
  • Climax
    (7 miles [11.3 km] to the southeast)
    • Climax is located in Greenwood County
    • Jump to our Gazetteer entry for Climax
    • Population from the 2020 Census: 64 people
  • Virgil
    (18 miles [29 km] to the northeast)
    • Virgil is located in Greenwood County
    • Jump to our Gazetteer entry for Virgil
    • Population from the 2020 Census: 62 people
  • Reece
    (8 miles [12.9 km] to the west)
    • Reece is located in Greenwood County
    • Jump to our Gazetteer entry for Reece
  • Ivanpah
    (11 miles [17.7 km] to the northwest)
    • Ivanpah is located in Greenwood County
    • Jump to our Gazetteer entry for Ivanpah
  • Neal
    (11 miles [17.7 km] to the east)
    • Neal is located in Greenwood County
    • Jump to our Gazetteer entry for Neal
  • Lapland
    (12 miles [19.3 km] to the northwest)
    • Lapland is located in Greenwood County
    • Jump to our Gazetteer entry for Lapland
  • Piedmont
    (14 miles [22.5 km] to the south)

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

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

We also have a detailed list of newspapers that have been published in the area around Eureka. Our list includes 23 papers. See our Newspapers Page for Eureka.

TripAdvisor Tourism Pages for Eureka ...

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

Adding Eureka to Our Gazetteer ...

We originally found mention of Eureka 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 Eureka was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<7>

From that list, the Eureka post office opened in 1858.

For more details, see References and Mentions for Eureka.

Footnotes ...

<1>If you're interested in how the shape of Kansas' counties, including Greenwood, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>A demonym is the name for a resident of a community which is usually derived from (or is related to) the name of that community. In other words, it's how the residents of Eureka refer to themselves. It's important to note that there aren't any rules for taking a city's name and turning it into a demonym. A demonym is informal and while the majority of Eureka may use one name, keep in mind that others may use something different.
<3>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Eureka.
<4>The elevation is an estimate for the area around Eureka - it will be higher in some places and lower in others.
<5>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 city (such as Eureka). When looking for a ZIP Code, whether Eureka or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<6>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<7>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/