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Welcome to Oakley ...

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

While we don't have a date for the founding of Oakley, you might consider that their post office opened  in 1898.

The city was incorporated July 1, 1999.

From the  Census Estimates for 2019, Oakley has a population of 42,338 people<2> (see below for details).

Oakley is near sea level<3>.

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

The telephone area code for Oakley: (925)

The ZIP code for Oakley: 94561<4>

Websites for Oakley ...

Official Website:

Population Details ...

Taken from the 2019 Census Estimates, Oakley had an population of 42,338 people. This is an increase of 19.49% since the 2010 Census (or an increase of 65.26% since the 2000 Census).

At the time of the 2010 Census, Oakley had a population of 35,432 people. This makes Oakley the county's 10th most populous community.

The population of Oakley represents 0.1% of the total population of California (which has 37,253,956 people), making it the state's 213rd most populous community.

With a 2010 count of 35,432 people, the population of Oakley increased 38.3% from the 2000 Census (which had a count of 25,619 people).

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

Communities Also Named Oakley ...

Using our Gazetteer, we found that there are 30 communities that are also named Oakley - they are located in Alabama, Delaware, Idaho, Illinois, Indiana (2), Iowa, Kansas, Kentucky, Louisiana (3), Maryland, Michigan, Mississippi, Missouri, North Carolina (2), Ohio, Oregon, Pennsylvania, South Carolina, Tennessee, Utah (2), Virginia (3), Wisconsin and Wyoming.

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

Communities near Oakley ...

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

  • Concord
    (17 miles [27.4 km] to the west)
    • Jump to our Gazetteer entry for Concord
    • Concord is located in Contra Costa County
    • Population from the 2020 Census: 128,544 people
    • Jump to TripAdvisor's Tourism page for Concord <5>
  • Pittsburg
    (9 miles [14.5 km] to the west)
  • Danville
    (19 miles [30.6 km] to the southwest)
    • Jump to our Gazetteer entry for Danville
    • Danville is located in Contra Costa County
    • Population from the 2020 Census: 44,883 people
    • Former name for Danville:
    • Inmanville
    • Jump to TripAdvisor's Tourism page for Danville <5>
  • Pleasant Hill
    (19 miles [30.6 km] to the west)
  • Clayton
    (12 miles [19.3 km] to the west)
    • Jump to our Gazetteer entry for Clayton
    • Clayton is located in Contra Costa County
    • Population from the 2020 Census: 11,527 people
    • Jump to TripAdvisor's Tourism page for Clayton <5>
  • Rio Vista
    (11 miles [17.7 km] to the north)
  • Isleton
    (12 miles [19.3 km] to the northeast)
  • Bethel Island
    (4 miles [6.4 km] to the east)
  • Brentwood
    (4 miles [6.4 km] to the south)
  • Antioch
    (5 miles [8 km] to the west)
    • Jump to our Gazetteer entry for Antioch
    • Antioch is located in Contra Costa County
    • Population from the 2020 Census: 111,605 people
    • Jump to TripAdvisor's Tourism page for Antioch <5>

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

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

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

TripAdvisor Tourism Pages for Oakley ...

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

Adding Oakley to Our Gazetteer ...

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

From that list, the Oakley post office opened in 1898.

We also found Oakley on a map titled Shell Oil Road Map for California (1956).

For more details, see References and Mentions for Oakley.

The official website for Oakley:

The official website for Contra Costa County:

The official website for State of California:

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 Oakley.
<3>The elevation is an estimate for the area around Oakley - 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 Oakley). When looking for a ZIP Code, whether Oakley 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 their list with background information can be found at:


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This page was last modified/updated: 21 Feb 2024