Demographics of Foster City city, California

Foster City city, California had 32,411 people on July 1, 2025, by the Census Bureau’s estimate: −1,326 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Foster City city, in four figures

32,411
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 32,792 ±53.; −3.9%
Change since July 2020: −1,326 people.; 39.5 ±1.5
Median age: ACS 2020–⁠2024.; $199,143 ±$11,786
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a place, so the change is the difference between one July estimate and the next.

Foster City city, California's population shrank 3.9% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Foster City city, California's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Foster City city, California's population shrank 3.9% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Foster City city, California's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	33,737	100.0	100.0
2021	32,751	97.1	100.2
2022	32,448	96.2	100.7
2023	32,430	96.1	101.6
2024	32,516	96.4	102.5
2025	32,411	96.1	103.1

Population of Foster City city, California on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	33,737	—
2021	32,751	−986
2022	32,448	−303
2023	32,430	−18
2024	32,516	+86
2025	32,411	−105

Age, 2020–2024

The median age is 39.5 ±1.5: for men 38.9 ±1.2 and for women 40.7 ±2.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Foster City city by age, ACS 2020–2024
Age	People	Share	California	United States
Under 5	2,117 ±366	6.5% ±1.1	5.5% ±<0.1	5.6% ±<0.1
5 to 17	5,160 ±553	15.7% ±1.7	16.5% ±<0.1	16.3% ±<0.1
18 to 24	1,574 ±347	4.8% ±1.1	9.1% ±<0.1	9.1% ±<0.1
25 to 44	10,418 ±718	31.8% ±2.2	28.7% ±<0.1	26.9% ±<0.1
45 to 64	7,764 ±533	23.7% ±1.6	24.6% ±<0.1	24.8% ±<0.1
65 and over	5,759 ±482	17.6% ±1.5	15.7% ±<0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $199,143 ±$11,786, and income per person $98,585 ±$4,705, in 2024 dollars. The median is $99,122 ±$310 in California and $80,734 ±$166 in the United States.

Households by income

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Households in Foster City city by income, ACS 2020–2024
Household income	Households	Share	California	United States
Under $25,000	658 ±169	5.1% ±1.3	12.5% ±0.1	14.6% ±<0.1
$25,000 to $49,999	798 ±221	6.1% ±1.7	13.3% ±0.1	16.7% ±<0.1
$50,000 to $74,999	924 ±241	7.1% ±1.8	13.0% ±0.1	15.5% ±<0.1
$75,000 to $99,999	796 ±170	6.1% ±1.3	11.6% ±0.1	12.6% ±<0.1
$100,000 to $149,999	1,832 ±295	14.1% ±2.2	17.8% ±0.1	17.5% ±<0.1
$150,000 to $199,999	1,503 ±226	11.6% ±1.7	11.3% ±0.1	9.6% ±<0.1
$200,000 or more	6,487 ±368	49.9% ±2.5	20.5% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Foster City city by age, ACS 2020–2024
Age	Below poverty	Rate	California	United States
All ages	1,334 ±367	4.1% ±1.1	12.0% ±0.1	12.5% ±0.1
Under 18	20 to 242	0.3% to 3.4%	15.0% ±0.1	16.1% ±0.1
18 to 59	592 ±217	3.3% ±1.2	11.0% ±0.1	11.6% ±0.1
60 and over	611 ±208	8.1% ±2.7	11.5% ±0.1	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Foster City city, ACS 2020–2024
Measure	Foster City city	California	United States
Housing units	13,617 ±370	14,644,735 ±1,665	143,775,355 ±10,234
Occupied	95.5% ±3.6	92.5% ±0.1	89.9% ±0.1
Vacant	4.5% ±1.7	7.5% ±0.1	10.1% ±0.1
Owner occupied	50.8% ±2.9	55.9% ±0.3	65.2% ±0.3
Renter occupied	49.2% ±2.5	44.1% ±0.2	34.8% ±0.1
Median home value	$1,838,200 ±$78,375	$734,700 ±$1,307	$332,700 ±$236
Median gross rent	At the edge of the top or bottom interval	$2,036 ±$5	$1,413 ±$2
Median year built	1976 ±1	1976 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Foster City city by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	California	United States
Hispanic or Latino	2,339 ±476	7.1% ±1.5	40.2% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	9,476 ±749	28.9% ±2.3	33.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	522 ±242	1.6% ±0.7	5.2% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	17,816 ±858	54.3% ±2.6	15.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	22 to 134	0.1% to 0.4%	0.3% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 94	0% to 0.3%	0.3% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	199 to 697	0.6% to 2.1%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	2,069 ±428	6.3% ±1.3	4.4% ±<0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Foster City city by place of birth and citizenship, ACS 2020–2024
Born	People	Share	California	United States
Born in the state	11,353 ±687	34.6% ±2.1	56.5% ±0.1	57.3% ±<0.1
Born in another state	4,631 ±509	14.1% ±1.6	15.0% ±0.1	26.9% ±<0.1
Born a citizen outside the states	590 ±208	1.8% ±0.6	1.5% ±<0.1	1.7% ±<0.1
Born abroad	16,218 ±788	49.5% ±2.4	27.0% ±0.1	14.1% ±<0.1
Naturalized citizens	8,014 ±612	24.4% ±1.9	14.7% ±0.1	7.4% ±<0.1
Not citizens	8,204 ±988	25.0% ±3.0	12.3% ±0.1	6.8% ±<0.1

Foster City city among the places of California

247th of 661 places of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the California page.

Places of California near Foster City city in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Manhattan Beach city	34,210 ±34
Westmont CDP	34,123 ±2,209
San Dimas city	33,789 ±81
Desert Hot Springs city	33,200 ±37
Fair Oaks CDP	32,799 ±1,611
Foster City city	32,792 ±53
Dana Point city	32,790 ±59
Los Gatos town	32,786 ±41
Menlo Park city	32,727 ±45
Goleta city	32,685 ±44
Bell city	32,476 ±39

Elsewhere on the site

Reported crime in Foster City city, California

Rankings this appears in

No. 1 Places by median home value
No. 1 Places in California by median home value
No. 5 Places in California by foreign-born share
No. 12 Places in California by median household income
No. 29 Places by foreign-born share
No. 30 Places in California by per capita income

Sources

Census Bureau population estimates — incorporated places and New England towns — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — incorporated places and New England towns and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026