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

Onyx is located in Kern County<1>.

Onyx was established in 1861.

Onyx is 2,790 feet [850 m] above sea level.<2> In other words, the elevation of Onyx is about ½ mile above sea level.

Time Zone: Onyx lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time

Area Codes for Onyx: 760 & 442<3>

The ZIP code for Onyx: 93255<4>

Communities Also Named Onyx ...

Using our Gazetteer, we found that there are 3 communities that are also named Onyx - they are located in Arkansas, Idaho and Missouri.

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

Communities near Onyx ...

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

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

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

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

TripAdvisor Tourism Pages for Onyx ...

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

Adding Onyx to Our Gazetteer ...

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

From that list, the Onyx post office opened in 1889.

For more details, see References and Mentions for Onyx.

Footnotes ...

<1>If you're interested in how the shape of California's counties, including Kern, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Onyx - 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 760 code has been Overlayed with the 442 area code. New phone numbers in the Onyx area will be assigned with one of these codes: 760 or 442. As a result, placing a call in the Onyx 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 Onyx). When looking for a ZIP Code, whether Onyx 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/