ZIP Code Tabulation Area · California

ZIP Code 94403: San Mateo, CA

ZIP Code 94403 (San Mateo, San Mateo County, California) has an estimated 43,276 residents in 16,414 households. The median household income is $174,917, the median home value is $1,746,300 and the median gross rent is $3,263/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

43,276

Margin of error ±1,493

Median household income

$174,917

Margin of error ±$15,671

Median home value

$1,746,300

Margin of error ±$48,183

Median gross rent

$3,263/mo

Margin of error ±$162

Median age

38.9 yrs

Margin of error ±0.9 yrs

Mean travel time to work

26.3 min

Margin of error ±2.5 min

How ZIP 94403 compares with California and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 9440338.9 yrsCalifornia37.9 yrsUnited States38.9 yrs

Median household income

ZIP 94403$174,917California$99,122United States$80,734

Per capita income

ZIP 94403$88,226California$49,513United States$44,673

Poverty rate

ZIP 944036.6%California12.0%United States12.5%

Unemployment rate

ZIP 944035.8%California6.6%United States5.2%

Bachelor's degree or higher

ZIP 9440360.6%California37.1%United States35.7%

Median home value

ZIP 94403$1,746,300California$734,700United States$332,700

Median gross rent

ZIP 94403$3,263/moCalifornia$2,036/moUnited States$1,413/mo

Owner-occupied homes

ZIP 9440352.5%California55.9%United States65.2%

Mean travel time to work

ZIP 9440326.3 minCalifornia28.7 minUnited States26.4 min

Worked from home

ZIP 9440325.5%California17.2%United States15.1%

All figures for ZIP 94403

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 94403 — ACS 2020–2024 5-year estimates
MeasureZIP 94403Margin of errorCaliforniaUnited States
Total population43,276±1,49339,287,377334,922,499
Median age38.9 yrs±0.9 yrs37.9 yrs38.9 yrs
Households16,414±53113,548,091129,227,496
Median household income$174,917±$15,671$99,122$80,734
Per capita income$88,226±$4,865$49,513$44,673
Poverty rate6.6%±1.2 pts12.0%12.5%
Unemployment rate5.8%±1.4 pts6.6%5.2%
Bachelor's degree or higher60.6%±2.7 pts37.1%35.7%
Median home value$1,746,300±$48,183$734,700$332,700
Median gross rent$3,263/mo±$162$2,036/mo$1,413/mo
Owner-occupied homes52.5%±1.9 pts55.9%65.2%
Mean travel time to work26.3 min±2.5 min28.7 min26.4 min
Worked from home25.5%±1.6 pts17.2%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 94403
GroupZIP 94403CaliforniaUnited States
White alone, not Hispanic or Latino35.7%33.8%57.4%
Black or African American alone, not Hispanic or Latino1.4%5.2%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.1%0.3%0.5%
Asian alone, not Hispanic or Latino31.1%15.3%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.5%0.3%0.2%
Some other race alone, not Hispanic or Latino1.3%0.6%0.6%
Two or more races, not Hispanic or Latino4.7%4.4%4.3%
Hispanic or Latino (of any race)25.3%40.2%19.3%

Where ZIP 94403 is

State
California
Main county
San Mateo County
Largest overlapping place
San Mateo (97% of the ZIP's land area)
Land area
5.63 sq mi· about 7,687 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in San Mateo County

94015 Daly City, CA94018 El Granada, CA94019 San Mateo County, CA94020 San Mateo County, CA94021 San Mateo County, CA94025 Menlo Park, CA94027 Atherton, CA94028 Portola Valley, CA94030 Millbrae, CA94037 Montara, CA94038 Moss Beach, CA94044 Pacifica, CA94060 San Mateo County, CA94061 Redwood City, CA94062 San Mateo County, CA94063 Redwood City, CA94065 Redwood City, CA94066 San Bruno, CA94070 San Carlos, CA94074 San Mateo County, CA94080 South San Francisco, CA94401 San Mateo, CA94402 San Mateo, CA94404 Foster City, CA

See every ZIP code in California, or compare ZIP 94403 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.