San Mateo County, California Population 2020

San Mateo County, California's estimated population is 771,019 with a growth rate of 0.10% in the past year according to the most recent United States census data. San Mateo County, California is the 15th largest county in California.

Year Population Growth Growth Rate
2020771,0197370.10%
2019770,2827370.10%
2018769,5457370.10%
2017768,8086040.08%
2016768,2042,7570.36%
2015765,4477,7771.03%
2014757,6708,6571.16%
2013749,0139,5861.30%
2012739,42711,0231.51%
2011728,4048,6791.21%
2010719,72570,10210.79%
1990649,62362,29410.61%
1980587,32931,0955.59%
1970556,234111,84725.17%
1960444,387208,72888.57%
1950235,659123,877110.82%
1940111,78234,37744.41%
193077,40540,624110.45%
192036,78110,19638.35%
191026,58514,491119.82%
190012,0942,00719.90%
189010,0871,41816.36%
18808,6692,03430.66%
18706,6353,421106.44%
18603,2140.00%

San Mateo County, California Population Growth

Population by Race

Race Population Percentage
White391,02451.05%
Asian215,33728.11%
Some Other Race85,57411.17%
Two or More Races42,7255.58%
Black or African American17,8492.33%
Native Hawaiian and Other Pacific Islander10,5041.37%
American Indian and Alaska Native2,9220.38%

San Mateo County, California Population Pyramid 2020

San Mateo County, California Median Age

39.6


Total

38.3


Male

41


Female

San Mateo County, California Adults

There are 604,687 adults, (117,867 of whom are seniors) in San Mateo County, California.

San Mateo County, California Age Dependency

57.3

Age Dependency Ratio

24.2

Old Age Dependency Ratio

33.1

Child Dependency Ratio

San Mateo County, California Sex Ratio

Female

388,084

50.67%

Male

377,851

49.33%

San Mateo County, California Households and Families

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

San Mateo County, California Household Types

Type Owner Renter
Married70%30%
All59.9%40.1%
Female50.9%49.1%
Male48.8%51.2%
Non Family46.2%53.8%

59.9%

Rate of Home Ownership

Type Count Average Size Owned
All261,9692.8959.9
Married143,9903.4870
Non Family78,8251.4246.2
Female26,9863.6350.9
Male12,1683.7248.8

3.39

Average Family Size

2.89

Average Household Size

5.1%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

San Mateo County, California Education

Education Attained Count Percentage
Less Than 9th Grade34,8626.36%
9th to 12th Grade24,4774.47%
High School Graduate82,17415.00%
Some College94,31717.21%
Associates Degree38,4397.02%
Bachelors Degree157,55628.76%
Graduate Degree116,07421.19%

San Mateo County, California Educational Attainment by Race

Name Total High School Bachelors
White234,658226,924139,861
Asian164,681151,86298,592
Hispanic115,16579,03122,762
Other Race52,68933,8228,056
Multiple Races17,75616,5798,556
Black13,60412,3603,741
Islander6,7165,8311,437
Native American2,0441,511379

The highest rate of high school graduation is among white people with a rate of 96.70%.

The highest rate of bachelors degrees is among asian people with a rate of 59.87%.

Name Average Male Female
Overall$58,541$66,036$51,562
Less Than High School$26,634$30,137$21,308
High School Grad$35,421$40,279$30,397
Some College$45,843$51,262$40,217
Bachelors Degree$74,048$89,244$62,852
Graduate Degree$113,072$137,908$93,382

$58,541

Average Earnings

$66,036

Average Male

$51,562

Average Female

San Mateo County, California Language

San Mateo County, California Language by Age

San Mateo County, California Language

53.71% of San Mateo County, California residents speak only English, while 46.29% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 19.44% of the population.

San Mateo County, California Poverty

San Mateo County, California Poverty by Race

Name Total In Poverty Poverty Rate
Hispanic186,85822,90112.26%
White300,94514,2914.75%
Other84,30712,00714.24%
Asian214,27210,9215.10%
Multiple42,3062,8346.70%
Black17,3322,53514.63%
Islander10,4461,0049.61%
Native2,88467323.34%

7.03%

Overall Poverty Rate

6.45%

Male Poverty Rate

7.59%

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 23.34% below the poverty level.

The race least likely to be in poverty in San Mateo County, California is White, with 4.75% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.35%. Among those working part-time, it was 9.04%, and for those that did not work, the poverty rate was 13.78%.

Name Poverty
Less Than High School15.71%
High School9.61%
Some College6.12%
Bachelors or Greater3.13%

San Mateo County, California Income

San Mateo County, California Income by Household Type

Name Median Mean
Households$113,776$162,639
Families$132,732$184,701
Married Families$154,745$207,821
Non Families$71,780$101,725

San Mateo County, California Marital Status

San Mateo County, California Marital Status

Marriage Rates

52.4%

Overall Marriage Rate

54.2%

Male Marriage Rate

50.7%

Female Marriage Rate

San Mateo County, California Married by Age and Sex

San Mateo County, California Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

San Mateo County, California Marital Status by Race

San Mateo County, California Veterans

25,226

Number of Veterans

23,623

Male Veterans

1,603

Female Veterans

War Veterans
Vietnam8,614
Second Gulf War3,381
First Gulf War3,290
Korea3,134
World War II1,712
Name Veterans % of Total
White18,4185.82%
Asian3,0891.73%
Hispanic3,0042.22%
Black1,79511.94%
Other8401.35%
2 or More6853.09%
Indian2018.35%
Hawaiian1982.53%

$San Mateo County, California Veterans by Education

5.14%

Veteran Poverty Rate

27.35%

Veteran Disability Rate

San Mateo County, California Employment Status

68.7%

Labor Force Participation

65.9%

Employment Rate

4.1%

Unemployment Rate

San Mateo County, California Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

47.92%

Born in California

65.18%

Native Born

34.82%

Foreign Born

14.86%

Non Citizen

Place of Birth

65.18% of San Mateo County, California residents were born in the United States, with 47.92% having been born in California. 14.86% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

  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