San Mateo County, California

33 cities & places have their primary county here.

Population: 745,100
Median household income: $156,000
Median home value: $1,494,500

San Mateo County, California counts 745,100 residents. 33 cities and places have their primary county here. At $156,000, its median household income sits above California's $96,334.

From 2019 to 2023, San Mateo County's population declined 2.9% from 767,423 to 745,100, while its median household income rose 27.2% from $122,641 to $156,000.

53.1% of adults 25 and older hold a bachelor's degree or higher. Owners occupy 59.1% of the area's occupied homes.

Demographics

ACS 2019–2023

Population: 745,100
Median age: 40.6 yrs
Median household income: $156,000
Median home value: $1,494,500
Median gross rent: $2,893
Housing units: 285,558
Homeownership rate: 59.1%
Bachelor's degree or higher: 53.1%
Unemployment rate: 4.5%

Trends

ACS 5-year · 2019–2023

Population

767,423745,100

Median household income

$122,641$156,000

Median home value

$1,089,400$1,494,500

Median gross rent

$2,316$2,893

Year	Population	Median household income	Median home value	Median gross rent
2019	767,423	$122,641	$1,089,400	$2,316
2020	765,623	$128,091	$1,163,100	$2,435
2021	762,488	$136,837	$1,225,900	$2,599
2022	754,250	$149,907	$1,441,300	$2,805
2023	745,100	$156,000	$1,494,500	$2,893

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 55.2%

5 to 1714.7%

18 to 247.2%

25 to 3414.4%

35 to 4414.6%

45 to 5413.6%

55 to 6413.1%

65 to 749.8%

75 and over7.5%

	Count	Share
Under 5	38,822	5.2%
5 to 17	109,242	14.7%
18 to 24	53,883	7.2%
25 to 34	107,065	14.4%
35 to 44	108,741	14.6%
45 to 54	101,014	13.6%
55 to 64	97,440	13.1%
65 to 74	73,383	9.8%
75 and over	55,510	7.5%

Race & ethnicity

	Count	Share
White (non-Hispanic)	266,446	35.8%
Black or African American	15,321	2.1%
American Indian & Alaska Native	898	0.1%
Asian	226,967	30.5%
Native Hawaiian & Pacific Islander	8,110	1.1%
Some other race	6,264	0.8%
Two or more races	35,716	4.8%
Hispanic or Latino (any race)	185,378	24.9%

Educational attainment (age 25+)

No high school diploma9.7%

High school graduate14.8%

Some college or associate's22.4%

Bachelor's degree29.2%

Graduate or professional degree23.9%

	Count	Share
No high school diploma	52,659	9.7%
High school graduate	80,468	14.8%
Some college or associate's	121,768	22.4%
Bachelor's degree	158,423	29.2%
Graduate or professional degree	129,835	23.9%

Commute to work

Mean travel time to work: 27 min

Drove alone57.6%

Carpooled8.8%

Public transit6.4%

Walked2.3%

Bicycle1.2%

Worked from home21.9%

Other means1.9%

How workers get to work

	Count	Share
Drove alone	222,613	57.6%
Carpooled	33,843	8.8%
Public transit	24,630	6.4%
Walked	9,047	2.3%
Bicycle	4,503	1.2%
Worked from home	84,741	21.9%
Other means	7,228	1.9%

Travel time

	Count	Share
Under 15 min	61,841	20.5%
15 to 29 min	113,752	37.7%
30 to 44 min	73,140	24.2%
45 to 59 min	27,361	9.1%
60+ min	25,770	8.5%

Households

Average household size: 2.77
Poverty rate: 6.5% (47,945 of 738,600)

	Count	Share
Family households	180,316	68.2%
Nonfamily households	84,108	31.8%

Housing

Median year structure built: 1966

Occupancy

	Count	Share
Occupied	264,424	92.6%
Vacant	21,134	7.4%

Tenure (of occupied units)

	Count	Share
Owner-occupied	156,244	59.1%
Renter-occupied	108,180	40.9%

1-unit, detached55.3%

1-unit, attached8.7%

2 to 4 units6.5%

5 to 19 units11.9%

20 or more units16.4%

Mobile home & other1.2%

Units in structure

	Count	Share
1-unit, detached	158,045	55.3%
1-unit, attached	24,804	8.7%
2 to 4 units	18,559	6.5%
5 to 19 units	33,864	11.9%
20 or more units	46,882	16.4%
Mobile home & other	3,404	1.2%

Geography

County GEOID: 06081
State: California
Land area: 449 sq mi
Water area: 292 sq mi
Center point: 37.4147, -122.3715