Welcome to Martinez ...

The coastal city of Martinez is located in Contra Costa County<1> and is the County Seat for Contra Costa County.

While we don't have a date for the founding of Martinez, you might consider that their post office opened  in 1851.

The city was incorporated April 1, 1876.

From the  Census Estimates for 2019, Martinez has a population of 38,463 people<2> (see below for details).

Martinez is 100 feet [30 m] above sea level.<3>.

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

Martinez is located in the (925) area code.

The ZIP code for Martinez: 94553<4>

Websites for Martinez ...

Official Website: www.cityofmartinez.org/

Population Details ...

Taken from the 2019 Census Estimates, Martinez had an population of 38,463 people. This is an increase of 7.37% since the 2010 Census (or an increase of 7.24% since the 2000 Census).

At the time of the 2010 Census, Martinez had a population of 35,824 people. This makes Martinez the county's 9th most populous community.

The population of Martinez represents 0.1% of the population of California (which has 37,253,956 people), making it the state's 210th most populous community.

With a 2010 count of 35,824 people, the population of Martinez has remained roughly the same as the 2000 Census (with a count of 35,866 people).

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

Communities Also Named Martinez ...

While we believe that this Martinez is located in Contra Costa County, we know of another 2 California communities named Martinez. Those communities are located in the following counties: Riverside and Tuolumne County.

Beyond California, there are 8 communities that are also named Martinez - they are located in Arizona, Georgia, New Mexico (3) and Texas.

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

Communities near Martinez ...

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

• Oakland
  (16 miles [25.7 km] to the southwest)
  • Jump to our Gazetteer entry for Oakland
  • Oakland is located in Alameda County
  • Population from the 2020 Census: 424,891 people
  • Jump to TripAdvisor's Tourism page for Oakland <5>
• Berkeley
  (12 miles [19.3 km] to the southwest)
  • Jump to our Gazetteer entry for Berkeley
  • Berkeley is located in Alameda County
  • Population from the 2020 Census: 122,726 people
  • Jump to TripAdvisor's Tourism page for Berkeley <5>
• Vallejo
  (8 miles [12.9 km] to the northwest)
  • Jump to our Gazetteer entry for Vallejo
  • Vallejo is located in Solano County
  • Population from the 2020 Census: 120,747 people
  • Jump to TripAdvisor's Tourism page for Vallejo <5>
• Fairfield
  (17 miles [27.4 km] to the north)
  • Jump to our Gazetteer entry for Fairfield
  • Fairfield is located in Solano County
  • Population from the 2020 Census: 117,580 people
  • Jump to TripAdvisor's Tourism page for Fairfield <5>
• Antioch
  (17 miles [27.4 km] to the east)
  • 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>
• Richmond
  (12 miles [19.3 km] to the southwest)
  • Jump to our Gazetteer entry for Richmond
  • Richmond is located in Contra Costa County
  • Population from the 2020 Census: 110,038 people
  • Jump to TripAdvisor's Tourism page for Richmond <5>
• San Ramon
  (18 miles [29 km] to the southeast)
  • Jump to our Gazetteer entry for San Ramon
  • San Ramon is located in Contra Costa County
  • Population from the 2020 Census: 82,865 people
  • Jump to TripAdvisor's Tourism page for San Ramon <5>
• Alameda
  (18 miles [29 km] to the south)
  • Jump to our Gazetteer entry for Alameda
  • Alameda is located in Alameda County
  • Population from the 2020 Census: 78,841 people
  • Jump to TripAdvisor's Tourism page for Alameda <5>
• Pittsburg
  (13 miles [20.9 km] to the east)
  • Jump to our Gazetteer entry for Pittsburg
  • Pittsburg is located in Contra Costa County
  • Population from the 2020 Census: 72,622 people
  • Jump to TripAdvisor's Tourism page for Pittsburg <5>
• Walnut Creek
  (8 miles [12.9 km] to the southeast)
  • Jump to our Gazetteer entry for Walnut Creek
  • Walnut Creek is located in Contra Costa County
  • Population from the 2020 Census: 69,936 people
  • Jump to TripAdvisor's Tourism page for Walnut Creek <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 Martinez. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Martinez.

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

We also have a detailed list of newspapers that have been published in the area around Martinez. Our list includes 25 papers. See our Newspapers Page for Martinez.

TripAdvisor Tourism Pages for Martinez ...

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

Adding Martinez to Our Gazetteer ...

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

From that list, the Martinez post office opened in 1851.

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

For more details, see References and Mentions for Martinez.

Off-the-Road Links ...

The official website for Martinez: www.cityofmartinez.org/

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

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