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San Mateo County

San Mateo County has 742,340 residents across 29 ZIP codes with their own report. Median household income is $158,855, 60% above the California figure. The typical owner-occupied home is valued at $1,559,600, and 54% of adults 25 and over hold a bachelor’s degree or higher.

County · ACS 2020–2024 · Updated October 24, 2026
742,340residentsACS 2020–2024
$158,855median household incomeCalifornia: $99K
$1,559,600median home valueowner-occupied homes
96%of households have broadbandhome internet subscription
San Mateo County in CaliforniaZIP codes in San Mateo County highlighted; the rest of California in grey
Map of California with San Mateo County highlighted

Sources: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates · U.S. Census Bureau, 2024 Gazetteer and 2020 ZCTA relationship files

All 29 ZIP codes.

Colour shows where each zip code sits among the others in the table, from lowest to highest.

ZIP codeResidentsHousehold incomeHome valueOwnersBachelor's+BroadbandCommute
9400227,534$204K$2.00M55%69%96%31 min
940054,692$156K$1.23M55%51%98%35 min
9401043,025$197K$2.00M60%69%96%32 min
9401445,315$123K$1.04M60%35%95%32 min
9401564,091$127K$1.17M60%41%95%30 min
940183,834$230K$1.43M84%56%98%32 min
9401914,419$154K$1.56M74%53%93%31 min
940201,694$250K$996K70%74%97%45 min
94021321$250K$1.07M72%71%100%55 min
9402540,721$217K$2.00M59%73%97%25 min
940277,002$250K$2.00M88%83%98%24 min
940286,531$250K$2.00M82%83%98%20 min
9403022,689$163K$1.93M61%53%94%31 min
940372,917$234K$1.58M78%67%93%35 min
940382,683$100K$1.12M99%47%84%35 min
9404437,274$160K$1.25M68%49%97%30 min
940601,465$128K$1.40M70%34%89%30 min
9406137,048$146K$1.90M54%51%95%26 min
9406225,759$233K$2.00M73%68%97%29 min
9406334,433$117K$1.04M31%35%94%26 min
9406511,673$216K$1.81M66%82%98%29 min
9406642,728$141K$1.21M62%45%95%26 min
9407030,447$240K$2.00M69%71%99%27 min
94074126$250K$-666667K66%54%100%30 min
9408064,761$137K$1.19M59%41%96%28 min
9440135,295$122K$1.18M43%46%95%28 min
9440225,475$173K$2.00M58%69%96%29 min
9440343,276$175K$1.75M53%61%97%29 min
9440435,881$192K$1.71M51%74%98%31 min

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

People.

742,340 residents in 264,419 households, next to the California figure.

20%
under 18
22%
aged 18–34
18%
aged 65 and over
24%
of households are people living alone
54%
of households are married couples

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Homes.

287,184 housing units; the median owner-occupied home is valued at $1,559,600 (±$16,159).

59%
of households own their home
55%
of homes are detached single-family houses
29%
are in buildings with 5 or more units
1%
are mobile homes
8%
of housing units are vacant
$2,922
median gross rent a month

When homes were built

2020 or later1%
2010–20195%
2000–20096%
1990–19996%
1980–198910%
1970–197916%
1960–196916%
1950–195922%
1940–194910%
1939 or earlier9%

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Income and work.

Household income and work, in 2024 dollars; median household income ±$2,851.

$158,855
median household income
6.7%
of people live below the poverty line
4.8%
unemployment rate
54%
of adults 25+ hold a bachelor’s degree or higher

The poverty rate uses the federal poverty thresholds, which vary with family size. It says nothing on its own about what a neighborhood is like to live in.

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Getting around.

How workers aged 16 and over get to work, and how long it takes.

29 min
average commute to work
16%
of commuters travel 45 minutes or more
65%
of workers drive or carpool
5%
take public transportation
4%
walk or bike
24%
work from home
6%
of households have no car

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Internet.

Home internet subscriptions.

96%
of households have a broadband subscription
3%
have no internet access at home

American Community Survey figures are estimates from a rolling sample, averaged over 2020–2024. Each comes with a margin of error, which is wider in places with fewer people.

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Around here.

Photographs taken near San Mateo County, California, shared on Wikimedia Commons under free licences.

Martin Building, 220 Linden Ave., South San Francisco, CA 10-2-2011 6-27-18 PM
i
Martin Building, 220 Linden Ave., South San Francisco, CA 10-2-2011 6-27-18 PM
Photo: Sanfranman59 · CC BY-SA 3.0
View on Wikimedia Commons
Martin Building, 220 Linden Ave., South San Francisco, CA 10-2-2011 6-28-17 PM
i
Martin Building, 220 Linden Ave., South San Francisco, CA 10-2-2011 6-28-17 PM
Photo: Sanfranman59 · CC BY-SA 3.0
View on Wikimedia Commons
Martin Building, 220 Linden Ave., South San Francisco, CA 10-2-2011 6-31-50 PM
i
Martin Building, 220 Linden Ave., South San Francisco, CA 10-2-2011 6-31-50 PM
Photo: Sanfranman59 · CC BY-SA 3.0
View on Wikimedia Commons