Foster City

33,805

Total Population in 2020

In 2020, Foster City was home to 33,805 people. Residents were predominantly working age, while those under 18 were a larger segment of the community than those 65 and older. The population was a majority Asian, with more women than men.

Most Populous Demographics

Category	Demographic	Total	Percentage
Age	18-64	20,701	61%
Sex	Female	17,195	51%
Race and Hispanic or Latino	Asian (Not Hispanic or Latino)	17,992	53%

Age

39.5

Median Age

In 2020, Foster City's population was a majority working-age adults, while those under age 18 were a moderately larger share of the community than those 65 and older. Looking at 10-year age ranges, 30-39 was the largest group.

Population by Age Range

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Population by Age Group

7,240

Under 18

20,701

18-64

5,864

65 and over

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Table: Population by Age Range

Age Range	Population in Foster City
Age Range	Total	Percentage
0-9	4,138	12%
10-19	3,687	11%
20-29	3,416	10%
30-39	5,946	18%
40-49	5,127	15%
50-59	3,958	12%
60-69	3,225	10%
70-79	2,750	8%
80+	1,558	5%

Table: Population by Age Group

Age Group	Population in Foster City
Age Group	Total	Percentage
Under 18	7,240	21%
18-64	20,701	61%
65 and over	5,864	17%

* For both charts above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P12 Sex by Age for Selected Age Categories.

Sex and Age

In 2020, females outnumbered males by a moderate amount in Foster City. Males 30-39 were the largest group by age, followed by females 30-39 and females 40-49. The biggest gap was in the 70-79 age group, where females were the larger share.

Population by Sex

16,610

Male

17,195

Female

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Population by Sex and Age

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Male

Female

Table: Population by Sex

Sex	Foster City
Sex	Total	Percentage
Male	16,610	49%
Female	17,195	51%

Table: Population by Sex and Age

Sex and Age	Foster City
Sex and Age	Total	Percentage
Male	16,610	49%
Male: 0-9	2,164	6%
Male: 10-19	1,913	6%
Male: 20-29	1,735	5%
Male: 30-39	3,021	9%
Male: 40-49	2,517	7%
Male: 50-59	1,918	6%
Male: 60-69	1,465	4%
Male: 70-79	1,197	4%
Male: 80+	680	2%
Female	17,195	51%
Female: 0-9	1,974	6%
Female: 10-19	1,774	5%
Female: 20-29	1,681	5%
Female: 30-39	2,925	9%
Female: 40-49	2,610	8%
Female: 50-59	2,040	6%
Female: 60-69	1,760	5%
Female: 70-79	1,553	5%
Female: 80+	878	3%

* For both charts above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P12 Sex by Age for Selected Age Categories.

Race and Hispanic or Latino

53%

Asian (Not Hispanic or Latino)

In 2020, Foster City had a majority Asian population. White residents also made up a significant segment of the community, while Hispanic and other/multiracial people were the next largest groups.

Population by Race and Hispanic or Latino

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Table: Population by Race and Hispanic or Latino

Race and Hispanic or Latino	Population in Foster City
Race and Hispanic or Latino	Total	Percentage
White	10,734	32%
Black or African American	479	1%
American Indian / Alaska Native	31	<1%
Asian	17,992	53%
Native Hawaiian / Pacific Islander	179	<1%
Other / Multi-racial	1,969	6%
Hispanic or Latino (any race)	2,421	7%

* Categorized as Not Hispanic. This means that all the racial groups marked with an asterisk — White, Black or African American, American Indian / Alaska Native, Asian, Native Hawaiian / Pacific Islander, and Other / Multi-racial — do not include individuals who identify as Hispanic or Latino. The "Hispanic or Latino (any race)" category is separate, as Hispanic/Latino is considered an ethnicity rather than a racial category. For the chart above, the data is collected from the U.S. Census Bureau Decennial Data 2020, Demographic and Housing Characteristics File (DHC), P5 Hispanic or Latino Origin by Race.