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2023 Demographics

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Summary Data for County: San Mateo

Population See More Population Data

Population

County: San Mateo

740,014

Persons

State: California 39,455,491 Persons

Percent Population Change: 2020 to 2023

County: San Mateo

-3.20%

State: California -0.21%

Race See More Race Data

Population by Race	County: San Mateo		State: California
Population by Race	Persons	% of Population	Persons	% of Population
White	279,917	37.83%	15,620,692	39.59%
Black/African American	15,447	2.09%	2,223,654	5.64%
American Indian/Alaskan Native	7,023	0.95%	666,603	1.69%
Asian	235,062	31.76%	6,169,631	15.64%
Native Hawaiian/Pacific Islander	8,046	1.09%	159,396	0.40%
Some Other Race	106,384	14.38%	8,687,315	22.02%
2+ Races	88,135	11.91%	5,928,200	15.03%

Ethnicity See More Ethnicity Data

Population by Ethnicity	County: San Mateo		State: California
Population by Ethnicity	Persons	% of Population	Persons	% of Population
Hispanic/Latino	183,753	24.83%	16,142,663	40.91%
Non-Hispanic/Latino	556,261	75.17%	23,312,828	59.09%

Age See More Age Data

Population by Age Group	County: San Mateo		State: California
Population by Age Group	Persons	% of Population	Persons	% of Population
0-4	39,349	5.32%	2,292,618	5.81%
5-9	40,232	5.44%	2,378,495	6.03%
10-14	40,874	5.52%	2,473,443	6.27%
15-17	25,142	3.40%	1,530,751	3.88%
18-20	23,329	3.15%	1,570,287	3.98%
21-24	31,126	4.21%	2,047,115	5.19%
25-34	102,089	13.80%	5,768,091	14.62%
35-44	109,047	14.74%	5,417,331	13.73%
45-54	99,033	13.38%	4,870,908	12.35%
55-64	95,747	12.94%	4,737,483	12.01%
65-74	77,013	10.41%	3,730,827	9.46%
75-84	38,620	5.22%	1,869,903	4.74%
85+	18,413	2.49%	768,239	1.95%

Sex See More Sex Data

Population by Sex
Population by Sex	County: San Mateo		State: California
Population by Sex	Persons	% of Population	Persons	% of Population
Male	366,867	49.58%	19,619,316	49.73%
Female	373,147	50.42%	19,836,175	50.27%

Households/Income See More Households/Income Data

Households

County: San Mateo

259,717

Households

State: California 13,463,717 Households

Families

County: San Mateo

175,739

Families

State: California 9,255,326 Families

Average Household Size

County: San Mateo

2.81

Persons

State: California 2.86 Persons

Households with Children

County: San Mateo

88,303

Households
(34.00% of Households)

State: California 5,077,617 Households (37.71% of Households)

Median Household Income by Race/Ethnicity	County: San Mateo	State: California
Median Household Income by Race/Ethnicity	Value	Value
All	$153,288	$89,624
White	$163,677	$95,626
Black/African American	$91,734	$64,468
American Indian/Alaskan Native	$89,763	$71,342
Asian	$182,864	$116,345
Native Hawaiian/Pacific Islander	$106,964	$92,656
Some Other Race	$92,786	$70,132
2+ Races	$149,782	$90,834
Hispanic/Latino	$101,290	$71,649
Non-Hispanic/Latino	$170,489	$99,925

Families Below Poverty

County: San Mateo

5,956

Families
(3.39% of Families)

State: California 795,628 Families (8.60% of Families)

Families Below Poverty with Children

County: San Mateo

3,770

Families
(2.15% of Families)

State: California 576,006 Families (6.22% of Families)

Housing See More Housing Data

Housing Units

County: San Mateo

280,906

Housing units

State: California 14,483,795 Housing units

Owner-Occupied Housing Units Average Value

County: San Mateo

$1,580,893

State: California $872,088

Education See More Education Data

Population 25+ by Educational Attainment	County: San Mateo		State: California
Population 25+ by Educational Attainment	Persons	% of Population Age 25+	Persons	% of Population Age 25+
Less than 9th Grade	30,335	5.62%	2,398,339	8.83%
Some High School, No Diploma	20,942	3.88%	1,982,643	7.30%
High School Grad	81,220	15.04%	5,607,775	20.65%
Some College, No Degree	85,896	15.91%	5,626,865	20.72%
Associate Degree	38,445	7.12%	2,137,120	7.87%
Bachelor's Degree	156,904	29.06%	5,875,636	21.63%
Master's Degree	80,127	14.84%	2,401,420	8.84%
Professional Degree	23,428	4.34%	672,648	2.48%
Doctorate Degree	22,665	4.20%	460,336	1.69%

Employment See More Employment Data

Population 16+: Unemployed

County: San Mateo

3.12%

State: California 5.28%

Demographics information provided by Claritas, updated March 2023, under these terms of use.