San Mateo County, California Population 2024

723,777

San Mateo County, California's estimated 2024 population is 723,777 with a growth rate of -0.35% 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 719,948 and has seen a growth of 0.53% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
2029710,897-2,576-0.36%
2028713,473-2,576-0.36%
2027716,049-2,576-0.36%
2026718,625-2,576-0.36%
2025721,201-2,576-0.36%
2024723,777-2,576-0.35%
2023726,353-2,576-0.35%
2022728,929-10,220-1.38%
2021739,149-23,330-3.06%
2020762,479-2,331-0.3%
2019764,810-3,600-0.47%
2018768,410-248-0.03%
2017768,6587300.1%
2016767,9282,4490.32%
2015765,4797,8261.03%
2014757,6538,5221.14%
2013749,1319,4311.27%
2012739,70010,7551.48%
2011728,9458,9971.25%
2010719,94800%
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%
190012,0942,00719.9%
189010,0871,41816.36%
18808,6692,03430.66%
18706,6353,421106.44%
18603,214-707,683-99.55%
showing: 34 rows
2024 Growth Rate
-0.35% (-2,576)
County Website
San Mateo County
County Seat
2020 Population
762,479
Area
449 mi²
Density
1612 people/mi²
Growth Since 2020
-5.08% (-38,702)

San Mateo County, California Population 2024

Population by Race

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Race
Population
Percentage (of total)
White327,62543.44%
Asian230,17430.52%
Other race82,36710.92%
Two or more races81,22010.77%
Black or African American17,2382.29%
Native Hawaiian or Pacific Islander9,1801.22%
Native American6,4460.85%

White

Asian

Other race

Two or more races

Black or African American

Native Hawaiian or Pacific Islander

Native American

San Mateo County, California Population by Race

San Mateo County, California Population Pyramid 2024

San Mateo County, California Median Age

40.3

Total

39.1

Male

41.6

Female

San Mateo County, California Adults

There are 604,063 adults, (127,520 of whom are seniors) in San Mateo County, California.

San Mateo County, California Age Dependency

58.3

Age Dependency Ratio

26.8

Old Age Dependency Ratio

31.5

Child Dependency Ratio

San Mateo County, California Sex Ratio

Female377,70850.08%
Male376,54249.92%

San Mateo County, California Population by Age

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

Household Type
Count
Average Size
Owner
Renter
All264,3232.8159.540.5
Married145,1503.4170.829.2
Non Family82,1271.3943.656.4
Female25,1073.6551.748.3
Male11,9393.5249.250.8

3.33

Average Family Size

2.81

Average Household Size

59.5%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

San Mateo County, California Households and Families

Male

Female

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Education Attained
Count
Percentage
Less Than 9th Grade30,3175.53%
9th to 12th Grade21,2813.88%
High School Graduate81,35714.85%
Some College87,45015.96%
Associates Degree37,7336.89%
Bachelors Degree161,02129.39%
Graduate Degree128,65823.49%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

San Mateo County, California Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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Race
Total
High School
Bachelors
White219,710213,472136,113
Asian176,885164,453109,990
Hispanic113,44783,12026,827
Other Race53,08036,75210,065
2+ Races43,53936,66117,276
Black13,10512,3904,727
Islander6,1865,5681,574
Native American4,2842,819732

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 asian people with a rate of 62.18%.

San Mateo County, California Educational Attainment by Race

All

Male

Female

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Name
Average
Male
Female
Overall$77,920$85,886$69,803
Less Than 9th Grade$34,227$39,560$27,203
High School Graduate$44,301$48,018$36,150
Some College$56,534$63,227$49,217
Bachelors Degree$96,243$111,307$83,433
Graduate Degree$146,435$174,822$118,838

$77,920

Average Earnings

$85,886

Average Male

$69,803

Average Female

San Mateo County, California Earnings by Educational Attainment

San Mateo County, California Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

San Mateo County, California Language

55.17% of San Mateo County, California residents speak only English, while 44.83% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 19.55% of the population.

San Mateo County, California Language

San Mateo County, California Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
Hispanic178,81417,2099.62%
White277,08813,4884.87%
Asian229,01711,8485.17%
Other81,4988,25110.12%
Multiple80,6795,1806.42%
Black16,4482,05712.51%
Islander9,1391,08911.92%
Native6,38881812.81%

6.43%

Overall Poverty Rate

5.65%

Male Poverty Rate

7.21%

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 12.81% below the poverty level.

The race least likely to be in poverty in San Mateo County, California is White, with 4.87% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.06%. Among those working part-time, it was 8.28%, and for those that did not work, the poverty rate was 13.88%.

San Mateo County, California Poverty

rate

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Rate
Poverty
Less Than 9th Grade16.26%
High School8.87%
Some College6.74%
Bachelors or Greater3.14%

San Mateo County, California Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed19.37%
Male Unemployed14.2%
Female Employed3.37%
Male Employed2.44%

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

San Mateo County, California Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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Name
Median
Mean
Households$149,907$216,684
Families$175,776$247,973
Married Families$202,679$277,778
Non Families$91,613$135,519

mean

median

Income by Household Type

San Mateo County, California Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

52.4%

Overall Marriage Rate

53.7%

Male Marriage Rate

51.2%

Female Marriage Rate

San Mateo County, California Married by Age and Sex

male

female

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 45-54.

San Mateo County, California Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

San Mateo County, California Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

20,300

Number of Veterans

18,860

Male Veterans

1,440

Female Veterans

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War
Veterans
Vietnam7,162
Second Gulf War3,238
First Gulf War2,818
Korea2,073
World War II686

San Mateo County, California Veterans by War

count

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Age Group
Veterans
75+7,690
65 to 744,615
35 to 543,782
55 to 643,100
18 to 341,113

San Mateo County, California Veterans by Age

count

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Name
Veterans
% of Total
White13,1434.85%
Asian3,3091.73%
Hispanic2,7272.05%
Other Race1,1921.88%
2+ Races1,1412.22%
Black1,0847.58%
Islander3254.58%
Native American1062.17%

San Mateo County, California Veterans by Race

San Mateo County, California Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

6.33%

Veteran Poverty Rate

26.68%

Veteran Disability Rate

San Mateo County, California Veterans by Education

LaborForceParticipation

67.8%

Labor Force Participation

64.7%

Employment Rate

4.5%

Unemployment Rate

San Mateo County, California Employment by Age

LaborForceParticipation

San Mateo County, California Employment by Race

LaborForceParticipation

San Mateo County, California Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

48.37%

Born in San Mateo County, California

64.84%

Native Born

35.16%

Foreign Born

14.41%

Non Citizen

20.75%

Naturalized

Place of Birth

64.84% of San Mateo County, California residents were born in the United States, with 48.37% having been born in California. 14.41% 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

Sources