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2024 Demographics

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Summary Data for County: San Mateo

Population See More Population Data

Population

County: San Mateo

728,762

Persons

State: California 39,172,872 Persons

Percent Population Change: 2020 to 2024

County: San Mateo

-4.67%

State: California -0.92%

Race See More Race Data

Population by Race	County: San Mateo		State: California
Population by Race	Persons	% of Population	Persons	% of Population
White	271,304	37.23%	15,278,513	39.00%
Black/African American	14,767	2.03%	2,215,038	5.65%
American Indian/Alaskan Native	6,552	0.90%	642,765	1.64%
Asian	230,377	31.61%	6,241,623	15.93%
Native Hawaiian/Pacific Islander	8,548	1.17%	157,245	0.40%
Some Other Race	104,081	14.28%	8,661,955	22.11%
2+ Races	93,133	12.78%	5,975,733	15.25%

Ethnicity See More Ethnicity Data

Population by Ethnicity	County: San Mateo		State: California
Population by Ethnicity	Persons	% of Population	Persons	% of Population
Hispanic/Latino	184,762	25.35%	16,180,144	41.30%
Non-Hispanic/Latino	544,000	74.65%	22,992,728	58.70%

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	36,532	5.01%	2,077,354	5.30%
5-9	38,716	5.31%	2,181,469	5.57%
10-14	41,120	5.64%	2,421,275	6.18%
15-17	25,313	3.47%	1,535,768	3.92%
18-20	25,551	3.51%	1,681,239	4.29%
21-24	32,547	4.47%	2,109,414	5.38%
25-34	95,246	13.07%	5,533,827	14.13%
35-44	110,178	15.12%	5,437,084	13.88%
45-54	98,846	13.56%	4,864,367	12.42%
55-64	94,166	12.92%	4,776,532	12.19%
65-74	73,856	10.13%	3,834,304	9.79%
75-84	40,566	5.57%	1,995,084	5.09%
85+	16,125	2.21%	725,155	1.85%

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	359,830	49.38%	19,351,680	49.40%
Female	368,932	50.62%	19,821,192	50.60%

Households/Income See More Households/Income Data

Households

County: San Mateo

255,649

Households

State: California 13,390,733 Households

Families

County: San Mateo

172,901

Families

State: California 9,208,261 Families

Average Household Size

County: San Mateo

2.81

Persons

State: California 2.86 Persons

Households With Own Children

County: San Mateo

72,274

Households
(28.27% of Households)

State: California 3,886,869 Households (29.03% of Households)

Median Household Income by Race/Ethnicity	County: San Mateo	State: California
Median Household Income by Race/Ethnicity	Value	Value
All	$146,636	$92,605
White	$159,670	$99,794
Black/African American	$91,152	$65,932
American Indian/Alaskan Native	$102,121	$74,709
Asian	$170,978	$120,716
Native Hawaiian/Pacific Islander	$140,118	$95,072
Some Other Race	$91,109	$71,773
2+ Races	$131,948	$90,032
Hispanic/Latino	$98,448	$75,515
Non-Hispanic/Latino	$163,187	$103,301

Families Below Poverty

County: San Mateo

7,022

Families
(4.06% of Families)

State: California 815,810 Families (8.86% of Families)

Families Below Poverty with Children

County: San Mateo

3,771

Families
(2.18% of Families)

State: California 568,841 Families (6.18% of Families)

Housing See More Housing Data

Housing Units

County: San Mateo

279,713

Housing units

State: California 14,486,492 Housing units

Owner-Occupied Housing Units Average Value

County: San Mateo

$1,584,200

State: California $901,353

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	30,631	5.79%	2,401,583	8.84%
Some High School, No Diploma	19,647	3.71%	1,870,987	6.89%
High School Grad	80,067	15.14%	5,621,896	20.69%
Some College, No Degree	84,532	15.98%	5,434,824	20.01%
Associate Degree	37,906	7.17%	2,147,325	7.90%
Bachelor's Degree	153,183	28.96%	5,965,443	21.96%
Master's Degree	76,909	14.54%	2,537,246	9.34%
Professional Degree	21,308	4.03%	690,747	2.54%
Doctorate Degree	24,800	4.69%	496,302	1.83%

Employment See More Employment Data

Population 16+: Unemployed

County: San Mateo

5.43%

State: California 7.31%

Demographics information provided by Claritas, updated April 2024, under these terms of use.