Foster City Population

1970–2026

32,105

2026 projection

4.8% since 2020 (decrease)

05K10K15K20K25K30K35K197019801990200020102020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Foster City. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202632,105-3060.94%
202532,411-1050.32%
202432,516+860.27%
202332,430-180.06%
202232,448-3030.93%
202132,751-9862.92%
202033,737+4651.40%
201933,272+500.15%
201833,222+2600.79%
201732,962+550.17%

Showing 10 of 21 years.

Foster City Demographics

39.5median age

Median age

Female40.7 yrs
Male38.9 yrs

Adults

25,515
5,759 seniors · 23%19,756 other adults

Sex

Female 52.2% · 17,124Male 47.8% · 15,668

Population by age

MaleFemale85+ years, male: 37785+ years, female: 62780–84 years, male: 49380–84 years, female: 63075–79 years, male: 43975–79 years, female: 71870–74 years, male: 58270–74 years, female: 65165–69 years, male: 52265–69 years, female: 72060–64 years, male: 97460–64 years, female: 84455–59 years, male: 86655–59 years, female: 1,02650–54 years, male: 96050–54 years, female: 1,11145–49 years, male: 82545–49 years, female: 1,15840–44 years, male: 1,47940–44 years, female: 1,19235–39 years, male: 1,61635–39 years, female: 1,55930–34 years, male: 1,18930–34 years, female: 1,60725–29 years, male: 88325–29 years, female: 89320–24 years, male: 53120–24 years, female: 61715–19 years, male: 88515–19 years, female: 64810–14 years, male: 1,11110–14 years, female: 9905–9 years, male: 1,0405–9 years, female: 9120–4 years, male: 8960–4 years, female: 1,22185+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 328 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Foster City Income

$199,143median household income

Median household income

$199,143

Half of households earn more, half earn less

Median earnings

$132,835

Typical yearly pay for a worker 25 or older.

Poverty rate

4.1%

About 1 in 24 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Foster City Marital Status

61% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married61%64%58%
Never married27%30%24%
Divorced5%4%6%
Widowed5%2%9%
Separated2%<1%3%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year