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

Altadena is located in Los Angeles County<1>.

While we don't have a date for the founding of Altadena, you might consider that their post office opened  in 1894.

Altadena is 1,350 feet [411 m] above sea level.<2>.

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

Area Code for Altadena: 626

The ZIP codes for Altadena: 91001, 91003<3>

Communities near Altadena ...

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

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

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

We also have a detailed list of newspapers that have been published in the area around Altadena. Our list includes 13 papers. See our Newspapers Page for Altadena.

TripAdvisor Tourism Pages for Altadena ...

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

Adding Altadena to Our Gazetteer ...

We originally found mention of Altadena 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 Altadena was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<5>

From that list, the Altadena post office opened in 1894.

We also found Altadena in the book titled Business Atlas and Shippers' Guide (1895).

For more details, see References and Mentions for Altadena.

Footnotes ...

<1>If you're interested in how the shape of California's counties, including Los Angeles, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>The elevation is an estimate for the area around Altadena - it will be higher in some places and lower in others.
<3>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 Altadena). When looking for a ZIP Code, whether Altadena or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<4>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<5>A copy of their list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/