San Mateo ZIP Codes — San Mateo County, CA

There are 5 unique ZIP codes in San Mateo, California. Area code: 650.

ZIP codes

18.14

sq mi land

0.73

sq mi water

650

area code

San Mateo, CA ZIP code map

About San Mateo, CA

San Mateo, California, is a vibrant city located in the heart of the San Francisco Peninsula. Nestled within San Mateo County, it offers a blend of urban amenities and suburban charm. Known for its diverse community and rich array of parks, San Mateo is an attractive destination for residents and visitors alike.

Location & geography

San Mateo sits approximately 20 miles south of San Francisco and 25 miles north of San Jose. It is bordered by cities such as Burlingame to the northwest, Foster City to the east, and Hillsborough to the west, showcasing a rich suburban landscape. The city spans a land area of 22.49 square miles and includes 1.31 square miles of water, providing a pleasant mix of urban life and natural beauty.

Community & economy

The character of San Mateo is defined by its welcoming spirit and a strong sense of community. It boasts a diverse economy, including technology, retail, and healthcare industries, which contribute significantly to the local job market. Daily life in San Mateo is enriched by various cultural events, shopping districts, and recreational activities, making it a lively place to live.

Transportation

San Mateo is conveniently accessed via major highways such as US Route 101 and Interstate 280, facilitating travel across the Bay Area. The nearest airport is San Francisco International Airport, located approximately 10 miles to the northwest. Public transportation options include Caltrain and SamTrans bus services, providing residents with ample commuting choices.

History

San Mateo was founded in the mid-19th century and has grown significantly since then, transitioning from an agricultural hub to a thriving suburban community. Key industries in the city have included various sectors, particularly technology and education, which have attracted numerous residents. Notable events in the city's history include its development during the post-World War II economic boom, leading to residential and commercial growth.

Did you know?

A surprising fact about San Mateo is its historic role in the development of California's citrus industry, which was prevalent in the late 19th century. Additionally, the city is home to the San Mateo County History Museum, located in a former courthouse built in the 1910s, which showcases the area's rich past.

ZIP codes for San Mateo, CA (5)

ZIP code	City	County	Map
94401	San Mateo	San Mateo	View map
94402	San Mateo	San Mateo	View map
94403	San Mateo	San Mateo	View map
94404	San Mateo	San Mateo	View map
94497	San Mateo	San Mateo	View map

Demographics & statistics

141,797

Population

38.8

Median age

$163,241

Median household income

$83,242

Per capita income

$1,591,750

Median home value

$3,158

Median monthly rent

53.3%

Home ownership

6.3%

Poverty rate

4.6%

Unemployment

32,194

Housing units

62.3%

Bachelor's or higher

Age distribution

Male Female

4,179

Under 5

4,270

3,842

5–9

3,926

4,047

10–14

4,135

3,300

15–19

3,373

3,327

20–24

3,401

11,731

25–34

11,988

10,875

35–44

11,114

8,813

45–54

9,006

4,166

55–59

4,257

3,971

60–64

4,059

5,948

65–74

6,078

3,887

75–84

3,973

2,043

85+

2,088

← Male

Female →

Age summary

Group	Count	%
Under 18	28,883	20.6%
18 and over	112,914	79.5%
65 and over	24,017	17.2%
Median age	38.8 years

Race & ethnicity

White 36.8%

Asian 28.8%

Hispanic or Latino 13.2%

Two or more races 9.3%

Other race 8.6%

Black or African American 1.7%

Native Hawaiian / Pacific Islander 1%

American Indian / Alaska Native 0.7%

Group	Count	%
White	60,060	36.8%
Asian	47,085	28.8%
Hispanic or Latino	21,513	13.2%
Two or more races	15,154	9.3%
Other race	14,084	8.6%
Black or African American	2,746	1.7%
Native Hawaiian / Pacific Islander	1,566	1%
American Indian / Alaska Native	1,102	0.7%

Household income

Under $10k 2.9%

$10k–$15k 1.4%

$15k–$25k 3.0%

$25k–$35k 3.1%

$35k–$50k 5.8%

$50k–$75k 8.2%

$75k–$100k 7.7%

$100k–$150k 15.3%

$150k–$200k 13.3%

$200k+ 39.5%

Range	% of households
Under $10k	2.9%
$10k–$15k	1.4%
$15k–$25k	3.0%
$25k–$35k	3.1%
$35k–$50k	5.8%
$50k–$75k	8.2%
$75k–$100k	7.7%
$100k–$150k	15.3%
$150k–$200k	13.3%
$200k+	39.5%
Median income	$163,241

Housing

Home values

Under $50k 1.0%

$50k–$100k 0.4%

$100k–$150k 0.4%

$150k–$200k 0.3%

$200k–$300k 0.6%

$300k–$500k 1.5%

$500k–$1M 15.8%

$1M+ 80.0%

Housing overview

Metric	Value
Median home value	$1,591,750
Median rent / month	$3,158
Owner occupied	53.3%
Renter occupied	46.7%
Vacant	6.3%
Single-family detached	42.9%
Large apartment buildings	24.9%
Mobile homes	0.1%
Median rooms	4.8
Avg household size (owned)	2.65

Year built

Era	%
2020 or later	0.4%
2010–2019	5.8%
2000–2009	4.0%
1990–1999	6.2%
1980–1989	11.3%
1970–1979	20.4%
1960–1969	15.5%
1950–1959	17.7%
1940–1949	10.0%
1939 or earlier	8.8%

Bedrooms

Size	% of units
No bedroom (studio)	6.3%
1 bedroom	18.3%
2 bedrooms	29.2%
3 bedrooms	27.9%
4 bedrooms	14.9%
5+ bedrooms	3.5%

Vehicles per household

Vehicles	% of households
No vehicle	5.8%
1 vehicle	36.2%
2 vehicles	39.3%
3 or more	18.8%

Heating fuel

Fuel type	%
Utility gas	58.7%
Electricity	36.5%
Propane / LP gas	2.0%
Fuel oil	0.2%
Wood	0.1%
Solar	0.4%
No fuel used	2.1%

Households & families

Household type	Count	%
Married-couple family	28,228	52.1%
Cohabiting couple	3,313	6.1%
Male householder, no spouse	9,366	17.1%
Female householder, no spouse	13,142	24.7%
Households with children under 18	16,484	30.6%
Households with seniors (65+)	16,352	30.6%
Average household size	2.59

Marital status

Status	Male	Female
Never married	34.9%	28.2%
Married	56.0%	51.7%
Separated	0.9%	1.9%
Widowed	2.3%	9.0%
Divorced	5.9%	9.2%

Education

Less than 9th grade 4.3%

Some HS, no diploma 2.8%

HS graduate 11.0%

Some college, no degree 13.5%

Associate's degree 6.1%

Bachelor's degree 32.2%

Graduate / professional 30.2%

Metric	%
HS diploma or higher	92.9%
Bachelor's or higher	62.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	2,258	7.3%
Kindergarten	1,488	4.8%
Elementary school	12,531	40.2%
High school	6,293	20.2%
College / grad school	8,831	27.5%

Employment

Industry of employment

Professional & management 26.7%

Education & healthcare 17.8%

Manufacturing 8.8%

Finance & real estate 7.9%

Retail trade 7.6%

Information 6.9%

Arts, food & hospitality 6.2%

Transportation & utilities 4.7%

Construction 4.5%

Other services 3.9%

Public administration 2.6%

Wholesale trade 2.1%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	63.0%
Service	11.5%
Sales & office	15.1%
Natural resources & construction	4.8%
Production & transportation	5.7%

Employment type

Type	%
Private sector	84.7%
Government	8.8%
Self-employed	6.3%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	57.9%
Carpool	7.8%
Public transit	6.6%
Walk	2.7%
Other means	3.0%
Avg commute (minutes)	29.4

Poverty

All people 6.3%

Under 18 years 5.6%

18 and over 6.5%

Married-couple families 3.0%

Female-led households 8.7%

Income support

Source	% of households
Social Security	25.3%
Retirement income	20.6%
Supplemental Security	3.1%
Cash public assistance	1.5%
Food stamps / SNAP	2.4%

Health indicators

Condition	%
High blood pressure	24.6%
High cholesterol	30.7%
Heart disease	4.5%
Stroke	2.1%
Asthma	8.4%
Arthritis	17.9%
Kidney disease	2.3%
Pulmonary disease	4.0%
Cancer	6.0%

Behavior / access	%
Binge drinking	16.7%
No physical activity	15.9%
Less than 7 hrs sleep	28.3%
Fair or poor health	10.2%
Poor mental health	11.7%
Poor physical health	7.4%
No health insurance	9.3%
Visited doctor (checkup)	67.2%
Visited dentist	72.4%
Cholesterol screening	92.5%
Teeth loss	6.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	3,620	3.2%

Disability	%
Any disability	9.2%
Under 18	3.5%
18–64 years	5.0%
65 and over	31.9%

Health insurance coverage

Type	%
Private insurance	82.6%
Public insurance	25.6%
Uninsured under 19	1.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	133,348	94.0%
Spanish	21,980	16.0%
Other Indo-European	8,200	6.0%
Asian & Pacific Islander	3,215	2.3%
Other languages	10,043	7.3%

Place of birth & citizenship

Origin	Count	%
Native born (US)	87,803	62.7%
Born in same state	85,683	61.2%
Born in different state	63,347	45.2%
Foreign born	2,120	1.4%
Naturalized citizen	53,994	37.4%
Not a US citizen	26,874	50.7%

Ancestry

Ancestry	Count	%
Italian	9,444	6.7%
French	7,473	5.3%
Arab	3,196	2.3%
Polish	1,404	1%
English	910	0.6%

Ancestry	Count	%
Irish	525	0.4%
Dutch	419	0.3%
German	350	0.2%
Norwegian	192	0.1%

Technology access

Metric	% of households
Computer access	38.2%
Internet access	97.8%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does San Mateo, CA have?

San Mateo, CA has 5 ZIP codes: 94401, 94402, 94403, 94404, and 94497. Each ZIP code serves a distinct delivery area within the city and surrounding region.