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The Commemorative
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The Commemorative Quarter for California

Welcome to Half Moon Bay ...

The coastal city of Half Moon Bay is located in San Mateo County<1>.

While we don't have a date for the founding of Half Moon Bay, you might consider that their post office opened  in 1861.

The city was incorporated July 15, 1959.

From the  Census Estimates for 2019, Half Moon Bay has a population of 12,571 people<2> (see below for details).

Half Moon Bay is near sea level<3>.

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

Half Moon Bay lies within the (650) area code.

The ZIP code for Half Moon Bay: 94019<4>

Websites for Half Moon Bay ...

Official Website:

Chamber of Commerce:

Population Details ...

Taken from the 2019 Census Estimates, Half Moon Bay had an population of 12,571 people. This is an increase of 11.01% since the 2010 Census (or an increase of 6.16% since the 2000 Census).

At the time of the 2010 Census, Half Moon Bay had a population of 11,324 people. This makes Half Moon Bay the county's 14th most populous community.

The population of Half Moon Bay represents 0.03% of the population of California (which has 37,253,956 people), making it the state's 355th most populous community.

With a 2010 count of 11,324 people, the population of Half Moon Bay decreased 4.37% from the 2000 Census (with a count of 11,842 people).

More information can be found on the Census Page for Half Moon Bay.

Communities Also Named Half Moon Bay ...

Using our Gazetteer, we found another community named Half Moon Bay - it's located in Alberta.

For more information, see our Tidbits & Trivia Page for Half Moon Bay.

Communities near Half Moon Bay ...

We have created a list of 10 communities that are near Half Moon Bay.

  • Daly City
    (15 miles [24.1 km] to the north)
  • San Mateo
    (9 miles [14.5 km] to the northeast)
  • Redwood City
    (11 miles [17.7 km] to the east)
  • Mountain View
    (19 miles [30.6 km] to the east)
  • Palo Alto
    (16 miles [25.7 km] to the east)
  • South San Francisco
    (13 miles [20.9 km] to the north)
  • San Bruno
    (11 miles [17.7 km] to the north)
  • Pacifica
    (11 miles [17.7 km] to the north)
  • Menlo Park
    (13 miles [20.9 km] to the east)
  • Foster City
    (11 miles [17.7 km] to the northeast)

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

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

We also have a detailed list of newspapers that have been published in the area around Half Moon Bay. Our list includes 6 papers. See our Newspapers Page for Half Moon Bay.

TripAdvisor Tourism Pages for Half Moon Bay ...

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

Adding Half Moon Bay to Our Gazetteer ...

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

From that list, the Half Moon Bay post office opened in 1861.

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

For more details, see References and Mentions for Half Moon Bay.

The official website for Half Moon Bay:

The official website for San Mateo County:

The official website for State of California:

Footnotes ...

<1>If you're interested in how the shape of California's counties, including San Mateo, 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 Half Moon Bay.
<3>The elevation is an estimate for the area around Half Moon Bay - 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 Half Moon Bay). When looking for a ZIP Code, whether Half Moon Bay 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: 25 Sep 2023