Mexican Population in Contra Costa County, CA by City : 2025 Ranking & Insights

The Mexican population in Contra Costa County, CA is recorded at 209,392 residents, based on the latest U.S. Census estimates. Each city in Contra Costa County, CA has some Mexican population, but the county''s higher total suggests additional rural or non-municipal representation. The analysis below explores how Mexican communities are spread across Contra Costa County, CA and comparable counties throughout California.

Top 5 cities with the largest Mexican population in Contra Costa County

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  • 1
    Richmond
    Mexican population in Richmond is 33,379
    28.93% of Richmond population is Mexican
  • 2
    Antioch
    Mexican population in Antioch is 28,031
    24.22% of Antioch population is Mexican
  • 3
    Concord
    Mexican population in Concord is 26,794
    21.56% of Concord population is Mexican
  • 4
    Pittsburg
    Mexican population in Pittsburg is 25,901
    34.14% of Pittsburg population is Mexican
  • 5
    San Pablo
    Mexican population in San Pablo is 13,062
    41.11% of San Pablo population is Mexican

Overview of Mexican population in Contra Costa County

  • Population Count and Percentage: American Community Survey data document Contra Costa County with 209,392 Mexican residents (18% of 1.2 million total county population), placing the jurisdiction at the 99th percentile nationally among counties and 70th percentile within California for Mexican population density, with demographic concentrations among the highest nationwide.
  • Comparison to State and National Averages: Census Bureau's ACS data documents Contra Costa County's Mexican demographic representation of 18%, exceeding the national average of 11.3% while remaining below California's elevated state average of 32.3%, placing the county above national concentration levels while below state demographic averages.
  • Share of Total State Population: Official American Community Survey show Contra Costa County's 209,392 Mexican residents constitute 1.7% of California's total Mexican population of 12.7 million.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey indicate Contra Costa County's density of 292.1 Mexican Americans per square mile exceeds California's average of 81.2 per square mile by three and a half times, establishing the county as a significant concentration center for Mexican demographic communities.
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19 Cities in Contra Costa County Ranked by Mexican Population

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ACS data [1] confirm Mexican populations in every incorporated city in the county, with the largest counts in Richmond, Antioch, Concord, and Pittsburg. The table below provides detailed figures, including total population, density measures, and demographic distributions, based on the current ACS data for all 19 incorporated cities included in this analysis*.
cities in Contra Costa County, CA ranked by Mexican population count
Rank by Mexican Population
City
Mexican Population
% of Total City Population
% of Total Contra Costa County Mexican Population
5 Year Rank Trend
1 Richmond 33,379 28.93% 15.94%
2 Antioch 28,031 24.22% 13.39%
3 Concord 26,794 21.56% 12.80%
4 Pittsburg 25,901 34.14% 12.37%
5 San Pablo 13,062 41.11% 6.24%
6 Brentwood 11,158 17.27% 5.33%
7 Oakley 10,996 24.82% 5.25%
8 4,535 12.28% 2.17%
9 3,976 4.64% 1.90%
10 3,881 5.56% 1.85%
11 2,919 15.50% 1.39%
12 2,719 7.92% 1.30%
13 2,498 9.52% 1.19%
14 2,133 4.91% 1.02%
15 2,081 8.07% 0.99%
16 944 3.73% 0.45%
17 864 5.15% 0.41%
18 550 5.02% 0.26%
19 517 2.66% 0.25%
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Methodology

This ranking list is based on data from the American Community Survey (ACS) 5-Year Estimates, conducted by the U.S. Census Bureau. The ACS is one of the most reliable sources for understanding population trends across different locations, and it provides estimates for various racial and ethnic groups at city, county, state and all geography levels down to the Census block group.
This list ranks city in Contra Costa County, CA by their Mexican population, using the most recent ACS data available.

How the Census defines Mexican population

The U.S. Census Bureau allows people to self-identify their ancestry, meaning individuals can write upto ancestries when responding to the survey. In this ranking, we include everyone who identifies as having Mexican ancestry, whether alone or in combination with another ancestry.
Here are a few important things to know about how ancestry is reported:
  • Some people identify as Mexican alone, while others identify as Mexican along with another race (such as Mexican and German).
  • We’ve used the “Mexican alone or in any combination” category unless noted otherwise, which gives a broader picture of the Mexican population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as Mexican alone or in combination in city. To provide additional context, we’ve also included two key percentages:
  1. % of Total City Population – This shows what percentage of the total state population identifies as Mexican .
  2. % of Total Contra Costa County Mexican Population – This tells us how much of the entire U.S. Mexican population lives in that state.
To keep things simple, all population numbers have been rounded to the nearest whole number, and percentages are rounded to one decimal place. Because of rounding, some percentages may not add up to exactly 100%.

Things to Keep in Mind

Like all survey-based data, ACS estimates come with some limitations. Here are a few things to be aware of:
  • In places with very small Mexican populations, the numbers may not be reported at all due to privacy protections or sampling variability in the survey.
  • Since the ACS is based on a sample, the numbers are estimates, not exact counts. That means they may slightly differ from other sources like the decennial U.S. Census.
  • City that don’t have any reported Mexican population are not included in the ranking but are listed separately below for reference.
This ranking is meant to provide a clear, data-driven look at where Mexican populations are most concentrated while keeping the numbers easy to understand.

Sources

  1. 2019-2023 5-Year Estimates.
  2. 2023.