San Mateo County, California Population 2022

San Mateo County, California's estimated population is 773,640 with a growth rate of 0.60% in the past year according to the most recent United States census data. San Mateo County, California is the 15th largest county in California. The 2010 Population was 718,451 and has seen a growth of 7.68% since this time.

Note: 2021 and 2022 data is projected
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San Mateo County, California Population Growth

Population by Race

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San Mateo County, California Population by Race

San Mateo County, California Population Pyramid 2022

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San Mateo County, California Median Age

39.8


Total

38.4


Male

41.3


Female

San Mateo County, California Adults

There are 608,854 adults, (123,817 of whom are seniors) in San Mateo County, California.

San Mateo County, California Age Dependency

Age Dependency Ratio

25.5

Old Age Dependency Ratio

32.3

Child Dependency Ratio

San Mateo County, California Sex Ratio

Female

386,376

50.47%

Male

379,247

49.53%

San Mateo County, California Population by Age

San Mateo County, California Renter vs Owner Occupied by Household Type

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San Mateo County, California Household Types

59.9%

Rate of Home Ownership

San Mateo County, California Households and Families

3.36

Average Family Size

2.87

Average Household Size

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San Mateo County, California Households by Type

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San Mateo County, California Educational Attainment by Sex (over 25)

San Mateo County, California Educational Attainment by Race

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The highest rate of high school graduation is among white people with a rate of 97.16%.

The highest rate of bachelors degrees is among white people with a rate of 61.55%.

San Mateo County, California Educational Attainment by Race

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$64,489

Average Earnings

$72,259

Average Male

$56,781

Average Female

San Mateo County, California Earnings by Educational Attainment

San Mateo County, California Language by Age

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San Mateo County, California Language

54.43% of San Mateo County, California residents speak only English, while 45.57% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 19.42% of the population.

San Mateo County, California Language

San Mateo County, California Poverty by Race

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6.18%

Overall Poverty Rate

5.54%

Male Poverty Rate

6.80%

Female Poverty Rate

Poverty in San Mateo County, California

The race most likely to be in poverty in San Mateo County, California is Native, with 24.94% below the poverty level.

The race least likely to be in poverty in San Mateo County, California is Other, with NaN% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.11%. Among those working part-time, it was 8.26%, and for those that did not work, the poverty rate was 13.10%.

San Mateo County, California Poverty

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San Mateo County, California Poverty Rate by Education

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San Mateo County, California Poverty Rate by Employment Status and Sex

San Mateo County, California Income by Household Type

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Income by Household Type

San Mateo County, California Marital Status

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Marriage Rates

52.6%

Overall Marriage Rate

54.1%

Male Marriage Rate

51.1%

Female Marriage Rate

San Mateo County, California Married by Age and Sex

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San Mateo County, California Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

San Mateo County, California Marital Status by Race

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San Mateo County, California Marital Status

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23,314

Number of Veterans

Male Veterans

Female Veterans

San Mateo County, California Veterans by War

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San Mateo County, California Veterans by Age

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San Mateo County, California Veterans by Race

San Mateo County, California Veterans by Education

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5.00%

Veteran Poverty Rate

26.67%

Veteran Disability Rate

San Mateo County, California Veterans by Education

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68.8%

Labor Force Participation

66%

Employment Rate

4%

Unemployment Rate

San Mateo County, California Employment by Age

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San Mateo County, California Employment by Race

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San Mateo County, California Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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48.17%

Born in San Mateo County, California

65.05%

Native Born

34.95%

Foreign Born

14.38%

Non Citizen

20.57%

Naturalized

Place of Birth

65.05% of San Mateo County, California residents were born in the United States, with 48.17% having been born in California. 14.38% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

San Mateo County, California Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources