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COUNTY · 2000 CENSUS

San Mateo County

California · 707,161 residents · 449 sq mi
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The short version

San Mateo County is home to 707,161 people in California. The typical home is worth $449,900. That is roughly 49% ahead of the California median. Median rent is $1,144 a month. This is an unusually credentialed place: 39% of adults have a four-year degree. The median household earns $70,819, about 66% above the national median.

At a glance
Wealthier
above the US median
US median: $42,589
Mid-age
median age 36.8
US median: 35.2
More educated
39% hold a bachelor's degree
US average: 24%
Stable housing
home values roughly flat, inflation adjusted
US median home: $120,530
Section 01

Population & growth

Total population
707,161
+9%since 1990
from 649,623 in 1990
1990 – 2025
Median age
36.8
+5%since 1990
from 35.0 in 1990
US average: 35.2
Land area
449 sq mi
Population, 1990 – 2024
638K673K709K744K779K19902000201020202024San Mateo County
2024742K
1990201020202024
Age distribution, 2000
Under 56.4%(45,374)
US avg: 6.8%
5 to 96.6%(46,930)
US avg: 7.3%
10 to 146.2%(44,179)
US avg: 7.3%
15 to 195.8%(40,803)
US avg: 7.2%
20 to 245.8%(40,897)
US avg: 6.7%
25 to 3415.9%(112,122)
US avg: 14.2%
35 to 4417.4%(122,699)
US avg: 16%
45 to 5414.5%(102,559)
US avg: 13.4%
55 to 649%(63,513)
US avg: 8.6%
65 to 746.3%(44,742)
US avg: 6.5%
75 to 844.5%(32,000)
US avg: 4.4%
85 and over1.6%(11,343)
US avg: 1.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$70,819
+16%inflation adjusted, since 1990
from $46,437 in 1990
US average: $42,589
1990 – 2024
Per capita income
$36,045
+61%since 1990
from $22,430 in 1990
US average: $21,522
Poverty rate
5.8%
−0.5 ptssince 1990
from 6.3% in 1990
US average: 12.4%
Section 03

Housing

Median home value
$449,900
Unchangedinflation adjusted, since 1990
from $340,800 in 1990
US average: $120,530
1990 – 2024
Median gross rent
$1,144
+13%inflation adjusted, since 1990
from $769 in 1990
US average: $602
Owner-occupied
61.4%
+1.2 ptssince 1990
from 60.2% in 1990
38.6% rent
Section 04

Race & ethnicity

1990
White, non-Hispanic72%(467,853)
Black5.3%(34,580)
Hispanic / Latino17.4%(113,090)
Asian16.8%(109,309)
2000
White, non-Hispanic49.8%(352,355)
Black3.4%(23,778)
Hispanic / Latino21.9%(154,708)
Asian19.8%(140,313)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Mexican14.4%(106,631)
Central American6.2%(46,282)
Salvadoran3%(22,557)
South American1.8%(13,462)
Guatemalan1.6%(12,183)
Nicaraguan1.1%(8,087)
Peruvian0.8%(5,793)
Puerto Rican0.6%(4,483)
Spaniard0.5%(3,659)
Colombian0.4%(3,204)
Honduran0.3%(2,142)
Cuban0.2%(1,447)
+ 10 more hispanic origin groups with data
Chilean0.2%(1,262)
Argentine0.1%(1,058)
Venezuelan0.1%(700)
Panamanian0.1%(666)
Bolivian0.1%(577)
Ecuadorian0.1%(522)
Costa Rican0.1%(413)
Dominican0%(211)
Uruguayan0%(174)
Asian origin
Chinese12.9%(95,682)
Filipino9%(66,869)
Asian Indian3.3%(24,382)
Japanese1.2%(8,866)
Korean1%(7,757)
Vietnamese0.6%(4,799)
Taiwanese0.5%(3,410)
Burmese0.4%(3,111)
Thai0.2%(1,410)
Pakistani0.2%(1,172)
Indonesian0.1%(852)
Cambodian0.1%(749)
+ 12 more asian origin groups with data
Nepalese0.1%(748)
Hmong0.1%(565)
Mongolian0.1%(451)
Sri Lankan0%(261)
Mien0%(152)
Uzbek0%(146)
Kazakh0%(134)
Malaysian0%(101)
Laotian0%(44)
Pacific Islander origin
Tongan0.6%(4,322)
Fijian0.4%(2,765)
Samoan0.4%(2,606)
Native Hawaiian0.3%(1,927)
Chamorro0.1%(721)
Guamanian0%(38)
Ancestry
Irish6.6%(49,306)
English6%(44,674)
German6%(44,630)
Italian5%(37,107)
American2.8%(21,060)
French1.7%(12,471)
Arab1.3%(9,876)
Scottish1.3%(9,309)
Russian1.3%(9,307)
Polish1.2%(9,062)
Swedish0.8%(5,990)
Portuguese0.7%(5,538)
+ 49 more ancestry groups with data
Norwegian0.7%(5,525)
Iranian0.7%(5,061)
Dutch0.6%(4,726)
Greek0.6%(4,568)
British0.6%(4,367)
Ukrainian0.5%(4,044)
Danish0.4%(3,074)
Brazilian0.4%(3,007)
Scotch-Irish0.4%(2,661)
Hungarian0.3%(2,348)
Welsh0.3%(2,314)
Swiss0.3%(2,139)
Lebanese0.3%(2,122)
Armenian0.3%(1,869)
Czech0.3%(1,861)
Austrian0.2%(1,789)
Turkish0.2%(1,502)
Palestinian0.2%(1,460)
Canadian0.2%(1,426)
Egyptian0.2%(1,383)
French Canadian0.2%(1,274)
Romanian0.2%(1,248)
Croatian0.2%(1,193)
West Indian0.1%(1,077)
Lithuanian0.1%(1,057)
Israeli0.1%(816)
Syrian0.1%(789)
Jordanian0.1%(771)
Finnish0.1%(749)
Belgian0.1%(698)
Serbian0.1%(613)
Slovak0.1%(593)
Nigerian0.1%(500)
Iraqi0.1%(476)
Bulgarian0.1%(464)
Jamaican0.1%(455)
Moroccan0.1%(412)
Australian0.1%(398)
Ghanaian0%(214)
Latvian0%(196)
Haitian0%(186)
Slovene0%(169)
Macedonian0%(164)
Ethiopian0%(146)
Kenyan0%(138)
Barbadian0%(21)
Section 05

Education

Bachelor's degree or higher
39.0%
+7.7 ptssince 1990
from 31.3% in 1990
US average: 24.4%
High school or higher
85.3%
+1.2 ptssince 1990
from 84.1% in 1990
US average: 80.3%
Graduate degree
14.6%
+3.5 ptssince 1990
from 11.1% in 1990
US average: 8.8%
Section 06

Commute & transportation

Average commute
18.5 min
−20%since 1990
from 23.1 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status
Men 15+
Never married32.6%(90,824)
Married57.8%(161,077)
Widowed2.2%(6,166)
Divorced7.3%(20,465)
Women 15+
Never married24.8%(72,171)
Married55%(160,309)
Widowed9.7%(28,297)
Divorced10.6%(30,802)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured
3.8%
−6.9 ptssince 2013
from 10.7% in 2013
US average: 8.4%
Employer-based
66.5%
−1.2 ptssince 2020
from 67.7% in 2020
US average: 54.8%
Direct-purchase
14.7%
−0.2 ptssince 2020
from 14.9% in 2020
US average: 13.8%
Medicare
17.3%
+1.4 ptssince 2020
from 15.9% in 2020
US average: 18.4%
Medicaid
15.9%
+1.6 ptssince 2020
from 14.3% in 2020
US average: 20.9%
VA health care
0.9%
−0.3 ptssince 2020
from 1.2% in 2020
US average: 2.2%
Any private
78.0%
−1.7 ptssince 2020
from 79.7% in 2020
US average: 67.1%
Any public
30.2%
+2.4 ptssince 2020
from 27.8% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)17.6%(3,060)
US avg: 26.4%
Gulf War (1990s)14.5%(2,523)
US avg: 24.3%
Vietnam era37.6%(6,539)
US avg: 33.1%
Korean War9.9%(1,722)
US avg: 4.5%
World War II2.1%(359)
US avg: 1%

Share of the 17,374 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper

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Head to head

Compare San Mateo County to nearby counties

SAN MATEO COUNTY VS
Alameda County
Income$129,367+83%
Home value$1,090,100+142%
Population1,636,630+120%
SEE FULL COMPARISON →
SAN MATEO COUNTY VS
Santa Cruz County
Income$111,093+57%
Home value$1,027,500+128%
Population258,852−65%
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SAN MATEO COUNTY VS
Santa Clara County
Income$164,281+132%
Home value$1,490,600+231%
Population1,914,391+157%
SEE FULL COMPARISON →
SAN MATEO COUNTY VS
Contra Costa County
Income$127,229+80%
Home value$866,800+93%
Population1,170,070+57%
SEE FULL COMPARISON →
Frequently asked

How many people live in San Mateo County, California?

San Mateo County, California has about 707,161 residents according to the 2000 Census.

What is the median household income in San Mateo County, California?

The typical household in San Mateo County, California earns about $70,819 a year. Half of households make more than that, and half make less.

Is San Mateo County, California expensive?

In San Mateo County, California, the median home is worth about $449,900, and the typical rent is about $1,144 a month.

How educated are people in San Mateo County, California?

About 39.0% of adults age 25 and over in San Mateo County, California hold a bachelor's degree or higher.

What is the poverty rate in San Mateo County, California?

About 5.8% of people in San Mateo County, California live below the federal poverty line.

Has San Mateo County, California grown since 1990?

Yes, San Mateo County, California has grown since 1990. The population has added about 57,538 residents, a change of about 9 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →