Foster City, CA Profile: Facts & Data

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Foster City, California - Basic Facts

The City of Foster City had a population of 34,461 as of July 1, 2023. Foster City ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in California. See peer rankings below.

The primary coordinate point for Foster City is located at latitude 37.5585 and longitude -122.2711 in San Mateo County. The formal boundaries for the City of Foster City encompass a land area of 3.8 sq. miles and a water area of 16.05 sq. miles. San Mateo County is in the Pacific time zone (GMT -8).

The City of Foster City has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

California is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Foster City is located within San Mateo CCD of San Mateo County.


Jump to... (On This Page!)
  1. Foster City 2023 Demographic Data
  2. Growth Rates for Foster City (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. California Research Tools (Easy Tools & Current Data)
  3. California Data Comparison Tool - 2023 Demographics
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Foster City, CA Data & Demographics (As of July 1, 2023)

POPULATION

Total Population 34,461 (100%)
Population in Households 34,211 (99.3%)
Population in Families 28,486 (82.7%)
Population in Group Quarters1 250 ( 0.7%)
Population Density 9,099
Diversity Index2 65
 
 

INCOME

Median Household Income $179,654
Average Household Income $226,308
% of Income for Mortgage4 57%
Per Capita Income $86,298
Wealth Index5 241
Socioeconomic Status Index6 Moderate (61.2)
 

HOUSING

Total HU (Housing Units) 13,836 (100%)
Owner Occupied HU 7,429 (53.7%)
Renter Occupied HU 5,710 (41.3%)
Vacant Housing Units 697 ( 5.0%)
Median Home Value $1,700,078
Average Home Value $1,683,706
Housing Affordability Index3 45
 

HOUSEHOLDS

Total Households 13,139
Average Household Size 2.60
Family Households 9,004
Average Family Size 3.00
NOTES
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR

2020-2023 2023-2028
Population 0.59% 0.16%
Households 0.59% 0.13%
Families   0.06%
Median Household Income   2.17%
Per Capita Income   2.24%
Owner Occupied HU   0.39%

Foster City, CA - Peer Comparisons by Rank and Percentile

The table below compares Foster City to the other 1,611 incorporated cities, towns and CDPs in California by rank and percentile using July 1, 2023 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 246 85th
Population Density # 80 95th
Median Household Income # 71 96th
Housing Affordability Index # 509 32nd
Per Capita Income # 111 93rd
Diversity Index # 943 42nd

Additional comparisons and rankings can be made with a VERY EASY TO USE California Census Data Comparison Tool.

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