RoadsideThoughts
A Gazetteer for the United States and Canada
Home >> State of California >> Contra Costa County >> Walnut CreekIndex...










Learn About
The Commemorative
Quarter for
California

The Commemorative Quarter for California





Welcome to Walnut Creek ...

The city of Walnut Creek is located in Contra Costa County<1>.

While we don't have a date for the founding of Walnut Creek, you might consider that their post office opened  in 1862.

The city was incorporated October 21, 1914.

A typical abbreviation for Walnut Creek: Walnut Crk. (or less commonly used: Walnut Ck. or Walnut Cr.)

From the  Census Estimates for 2019, Walnut Creek has a population of 70,080 people<2> (see below for details).

Walnut Creek is 190 feet [58 m] above sea level.<3>.

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

Area Code for Walnut Creek: 925

The ZIP codes for Walnut Creek: 94595-94598<4>

Population Details ...

Taken from the 2019 Census Estimates, Walnut Creek had an population of 70,080 people. This is an increase of 9.2% since the 2010 Census (or an increase of 9% since the 2000 Census).

At the time of the 2010 Census, Walnut Creek had a population of 64,173 people (which is 6.1% of the total population of Contra Costa County). This makes Walnut Creek the county's 5th most populous community.

The population of Walnut Creek represents 0.17% of the population of California (which has 37,253,956 people), making it the state's 128th most populous community.

With a 2010 count of 64,173 people, the population of Walnut Creek has remained roughly the same as the 2000 Census (which had a count of 64,296 people).

More information can be found on the Census Page for Walnut Creek.

Communities Also Named Walnut Creek ...

Using our Gazetteer, we found that there are 13 communities that are also named Walnut Creek - they are located in Georgia, Kansas (6), Mississippi, North Carolina (3), Ohio and South Carolina.

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

Websites for Walnut Creek ...

Official Website:   www.ci.walnut-creek.ca.us/

Chamber of Commerce:   www.walnut-creek.com/

Communities near Walnut Creek ...

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

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

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

We also have a detailed list of newspapers that have been published in the area around Walnut Creek. Our list includes 12 papers. See our Newspapers Page for Walnut Creek.

TripAdvisor Tourism Pages for Walnut Creek ...

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

Adding Walnut Creek to Our Gazetteer ...

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

X2X - From that list, the Walnut Creek post office opened in 1862.

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

For more details, see References and Mentions for Walnut Creek.

The official website for Walnut Creek: www.ci.walnut-creek.ca.us/

The official website for Contra Costa County: www.co.contra-costa.ca.us/

The official website for State of California: https://www.ca.gov/

Footnotes ...

<1>If you're interested in how the shape of California's counties, including Contra Costa, 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 Walnut Creek.
<3>The elevation is an estimate for the area around Walnut Creek - 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 city (such as Walnut Creek). When looking for a ZIP Code, whether Walnut Creek or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

Our list of ZIP Codes for Walnut Creek includes: 94595, 94596, 94597 & 94598.
<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 their list with background information can be found at:

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




 

Copyright 2025
All Rights Reserved

Thank you for visiting our website.

In closing, please keep in mind that we can not guarantee the accuracy or timeliness of the information on this website, so use with care. We encourage you to double-check the information that is critical to you.

If you've found an error or have additional information that you would like to share, please don't hesitate to write: Click here to contact us.

This page was last modified/updated: 28 Apr 2025