Foster City, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Foster City, California is 32,964 as of the 2023 American Community Survey, making it the 245th-largest city in California. The median household income is $193,633, the median home value is $1,774,500, and the median age is 39.7.
The population has grown 6.7% since 2010 (30,609 → 32,657).
32,964
Population
8705
People / sq mi
$193,633
Median Income
$1,774,500
Median Home Value
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Foster City covers 3.8 sq mi of land at 8705 people per square mile.
About Foster City, CA
Housing cost is the defining feature of Foster City: the median home is valued at $1,774,500. With 32,964 residents, Foster City is a city in California.
Earnings sit at the high end: a median household income of $193,633, above the US median of $78,538. The poverty rate, 3.3%, is on the lower side for US cities and below the national 12.4%. Real estate commands a premium here — a median home value of $1,774,500, with typical rent around $3,501.
The population is unusually well-credentialed for US cities — 74.1% of adults have a four-year degree, above the national 35.0%. Working from home is common here: 30.1% of workers do so, above the national 14.0%, and the average commute runs about 31 minutes each way.
High housing values reframe the income picture in Foster City — even solid earnings stretch less against home prices and rents at this level.
Foster City city Population History (2010-2024)
The city of Foster City city had a population of 30,609 in 2010 and 32,657 in 2024, a 6.7% growth over 14 years. The peak was 34,292 in 2017. Average annual growth rate: 0.48%.
32,657
Population (2024)
30,609
Population (2010)
34,292
Peak (2017)
0.48%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 30,609 |
| 2011 | 30,965 |
| 2012 | 32,098 |
| 2013 | 32,416 |
| 2014 | 32,698 |
| 2015 | 33,470 |
| 2016 | 34,279 |
| 2017 | 34,292 |
| 2018 | 34,109 |
| 2019 | 33,901 |
| 2020 | 33,737 |
| 2021 | 32,742 |
| 2022 | 32,453 |
| 2023 | 32,442 |
| 2024 | 32,657 |
Race & Ethnicity
| White | 33.0% |
| Black or African American | 1.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.7% |
| Two or More Races | 0.1% |
Economy & Income
$193,633
Median Household Income
$95,509
Per Capita Income
3.3%
Poverty Rate
3.2%
Unemployment Rate
Housing
$1,774,500
Median Home Value
$3,501
Median Rent
51.2%
Owner-Occupied
Education
95.9%
High School+
74.1%
Bachelor's+
Commute
3.9%
Drive Alone
55.1%
Public Transit
30.1%
Work From Home
30.7 min
Avg Commute
Community Profile
15.1%
Foreign Born
46.3%
Non-English at Home
2.8%
Veterans
8.9%
With Disability
97.7%
Health Insurance
98.8%
Internet Access
Employment by Industry
| Finance, Insurance & Real Estate | 30.6% |
| Professional, Scientific & Management | 14.0% |
| Manufacturing | 13.3% |
| Transportation & Warehousing | 9.1% |
| Information | 9.0% |
| Retail Trade | 5.3% |
| Education, Health Care & Social Services | 4.0% |
| Arts, Entertainment & Food Services | 2.9% |
| Construction | 2.5% |
| Public Administration | 2.2% |
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Frequently Asked Questions
Foster City, California has a population of 32,964 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 245th-largest city in California.
The median household income in Foster City, California is $193,633, with 3.3% of residents living below the federal poverty level.
The median home value in Foster City, California is $1,774,500, with median monthly rent at $3,501 and a homeownership rate of 51.2%.
The median age in Foster City, California is 39.7 years. The population is 48.4% male and 51.6% female.
The population has grown 6.7% since 2010 (30,609 → 32,657).
Foster City city, CA Climate
Foster City city, CA has an average annual temperature of 14.4°C (58°F) and receives about 523 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
14.4°C
Avg Temp
523
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 10° / 49° | 108 mm |
| February | 11° / 53° | 91 mm |
| March | 12° / 54° | 83 mm |
| April | 14° / 56° | 34 mm |
| May | 15° / 60° | 10 mm |
| June | 17° / 63° | 3 mm |
| July | 18° / 65° | 1 mm |
| August | 18° / 65° | 2 mm |
| September | 18° / 65° | 6 mm |
| October | 16° / 61° | 31 mm |
| November | 13° / 55° | 75 mm |
| December | 10° / 50° | 79 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Foster City city, CA
The most comfortable months to visit Foster City city, CA are typically August, July and September, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 24°C high). The coldest is January (near 5°C low). January is usually the wettest month.
Where to stay near Foster City
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.