Foster City, California Population 2024

30,928

Foster City is a city located in San Mateo County California. Foster City has a 2024 population of 30,928. Foster City is currently declining at a rate of -1.74% annually and its population has decreased by -8.18% since the most recent census, which recorded a population of 33,685 in 2020.

The average household income in Foster City is $234,829 with a poverty rate of 3.78%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Foster City is 39.9 years, 38.7 years for males, and 41.3 years for females.

Foster City Demographics

According to the most recent ACS, the racial composition of Foster City was:

  • Asian: 53.1%
  • White: 34.46%
  • Two or more races: 8.21%
  • Black or African American: 2.12%
  • Other race: 1.61%
  • Native American: 0.32%
  • Native Hawaiian or Pacific Islander: 0.18%
Land Area (mi²)
3.8 sq mi
Density (mi²)
8,147.80/sq mi
Growth Since 2020
-8.18% (-2,757)
The current population of Foster City, California is 30,928 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 33,685.

Foster City, California Population 2024

Population by Race

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Race
Population
Percentage (of total)
Asian17,63653.1%
White11,44534.46%
Two or more races2,7278.21%
Black or African American7042.12%
Other race5361.61%
Native American1060.32%
Native Hawaiian or Pacific Islander610.18%
showing: 7 rows

Asian

White

Two or more races

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Foster City Population by Race

Foster City Population Pyramid 2024

Foster City Median Age

39.9

Total

38.7

Male

41.3

Female

Foster City Adults

There are 25,757 adults, (6,019 of whom are seniors) in Foster City.

Foster City Age Dependency

68.3

Age Dependency Ratio

30.5

Old Age Dependency Ratio

37.8

Child Dependency Ratio

Foster City Sex Ratio

Female16,90550.9%
Male16,31049.1%

Foster City Population by Age

Foster City Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All12,6582.6152.547.5
Married7,4283.159.240.8
Non Family3,8311.4642.857.2
Female9783.0538.261.8
Male4213.2955.644.4
showing: 5 rows

3.08

Average Family Size

2.61

Average Household Size

52.5%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Foster City Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Foster City Educational Attainment by Sex (over 25)

Foster City Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among islander people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 79.57%.

Foster City Educational Attainment by Race

All

Male

Female

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$125,852

Average Earnings

$140,996

Average Male

$107,686

Average Female

Foster City Earnings by Educational Attainment

Foster City Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Foster City Language

46.01% of Foster City residents speak only English, while 53.99% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 31.62% of the population.

Foster City Language

Foster City Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
Asian17,6216793.85%
White10,0834594.55%
Hispanic2,458722.93%
Black688334.8%
Other53471.31%
showing: 5 rows

3.78%

Overall Poverty Rate

3.44%

Male Poverty Rate

4.1%

Female Poverty Rate

Poverty in Foster City

The race most likely to be in poverty in Foster City is Black, with 4.8% below the poverty level.

The race least likely to be in poverty in Foster City is Other, with 1.31% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.4%. Among those working part-time, it was 6.21%, and for those that did not work, the poverty rate was 9.94%.

Foster City Poverty

rate

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Rate
Poverty
Less Than 9th Grade19.25%
High School10.24%
Some College3.41%
Bachelors or Greater2.92%
showing: 4 rows

Foster City Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed21.49%
Male Unemployed3.63%
Female Employed1.75%
Male Employed1.33%
showing: 4 rows

Foster City Poverty Rate by Employment Status and Sex

Foster City Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Foster City Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

62.1%

Overall Marriage Rate

63.6%

Male Marriage Rate

60.8%

Female Marriage Rate

Foster City Married by Age and Sex

male

female

Foster City Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

Foster City Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Foster City Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

728

Number of Veterans

682

Male Veterans

46

Female Veterans

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Foster City Veterans by War

count

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Foster City Veterans by Age

count

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Foster City Veterans by Race

Foster City Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

2.88%

Veteran Poverty Rate

33.1%

Veteran Disability Rate

Foster City Veterans by Education

LaborForceParticipation

66.5%

Labor Force Participation

63.4%

Employment Rate

4.3%

Unemployment Rate

Foster City Employment by Age

LaborForceParticipation

Foster City Employment by Race

LaborForceParticipation

Foster City 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

37.11%

Born in Foster City

52.04%

Native Born

47.96%

Foreign Born

24.14%

Non Citizen

23.82%

Naturalized

Place of Birth

52.04% of Foster City residents were born in the United States, with 37.11% having been born in California. 24.14% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Foster City Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202928,183-549-1.91%
202828,732-549-1.87%
202729,281-549-1.84%
202629,830-549-1.81%
202530,379-549-1.78%
202430,928-549-1.74%
202331,477-549-1.71%
202232,026-549-1.69%
202132,575-1,110-3.3%
202033,6854131.24%
201933,272500.15%
201833,2222600.79%
201732,962550.17%
201632,907660.2%
201532,8411990.61%
201432,6426341.98%
201332,0087052.25%
201231,3034061.31%
201130,8973000.98%
201030,5971,7946.23%
200028,8036272.23%
199028,1764,88920.99%
198023,28713,765144.56%
19709,522
showing: 24 rows

Foster City Population by Year