Welcome to Eureka ...

So far, we found very little information about Eureka. The little that we've found leads us believe that the community is historic.<1>

We've added Eureka to our Gazetteer with the hope that we can develop more information. We would especially like to find the location of Eureka - knowing its coordinates, we can explore things like its relationship to neighboring communities, nearby cemeteries, etc. If you can help us with Eureka, please Contact Us.

While we don't have the exact location of Eureka , we believe that it would have been located within present day Sullivan County<2>.

While we don't have a date for the founding of Eureka, you might consider that their post office opened in 1869.

When the people of Eureka referred to themselves (known as a demonym), they are believed to have used Eurekan<3>

Time Zone: The area where Eureka was located is in the Eastern Time Zone (EST/EDT) and observes daylight saving time

Communities Also Named Eureka ...

Using our Gazetteer, we found that 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), Kansas (6), Kentucky, Louisiana, Maine, Michigan (2), Minnesota, Mississippi, Missouri (4), Montana (2), Nebraska, Nevada (2), 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.

Adding Eureka to Our Gazetteer ...

The earliest source we've referenced which mentioned Eureka was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<4>

From that list, the Eureka post office opened in 1869.

We also found Eureka in the book titled List of Post Offices in the United States (1870).

For more details, see References and Mentions for Eureka.

Footnotes ...

<1>	We use the term 'Historic' broadly and it generally means that the community no longer exists. However, it can also mean that the community might still exist, but was significantly larger or had a more 'official' existence in the past than it does now. Unfortunately our sources of data have proven to be unreliable. If you can provide us with more specific information about Eureka, please let us know so that we can improve our accuracy.
<2>	If you're interested in how the shape of New York's counties, including Sullivan, have changed over time, we recommend the Atlas of Historical County Boundaries.
<3>	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 community'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.
<4>	A copy of their list with background information can be found at: https://cblevins.github.io/us-post-offices/data-biography/