94964 ZIP Code — San Quentin, CA

Marin County, California

ZIP code 94964 is located in San Quentin, California, within Marin County. It covers approximately 0.46 square miles and serves a population of 2,054 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 415/628.

About ZIP code 94964

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1950s, giving the area an established character.

The dominant occupation class is natural resources, construction, and trades, with manufacturing as the leading industry.

Health indicators show elevated rates of smoking (20%) compared to national benchmarks.

Overall, ZIP code 94964 reflects a community defined by a trades-oriented workforce and economic challenges above the national average.

2,054

population

0.46

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

94964 ZIP code map

Cities in ZIP code 94964

Below are the cities the US Postal Service accepts for ZIP code 94964. Using any city not on this list may result in mail delivery delays.

City	Status
San Quentin	Acceptable

Demographics updated 06/2026

Population
Total population	2,054
Population density	4,465 / sq mi
State FIPS	06
County FIPS	041

Geography
Land area	0.46 sq mi
Water area	0.36 sq mi
Latitude	37.9420
Longitude	-122.4900
Timezone	Pacific (PT)
Area code	415/628

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	29.9%	21.4%	32.6%
$50k – $100k	70.1%	21.0%	27.7%
$100k – $200k	0.0%	27.8%	26.4%
Over $200k	0.0%	29.8%	13.3%

Demographics & statistics

2,054

Population

4,465

People per sq mi

47.3

Median age

Median household income

$8,390

Per capita income

Median home value

Median monthly rent

0.0%

Home ownership

46.2%

Poverty rate

0.0%

Unemployment

Housing units

1.3%

Bachelor's or higher

Age distribution

Male Female

15–19

199

20–24

385

25–34

312

35–44

336

45–54

231

55–59

141

60–64

335

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	0	0.0%
18 and over	2,054	100.0%
65 and over	375	18.3%
Median age	47.3 years

Race & ethnicity

White 26.9%

Black or African American 24.9%

Hispanic or Latino 18.4%

Other race 15.7%

Two or more races 6.4%

Asian 4.4%

American Indian / Alaska Native 2.9%

Native Hawaiian / Pacific Islander 0.4%

Group	Count	%
White	677	26.9%
Black or African American	626	24.9%
Hispanic or Latino	464	18.4%
Other race	396	15.7%
Two or more races	162	6.4%
Asian	112	4.4%
American Indian / Alaska Native	72	2.9%
Native Hawaiian / Pacific Islander	9	0.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	29.9%	21.4%	32.6%
$50k – $100k	70.1%	21.0%	27.7%
$100k – $200k	0.0%	27.8%	26.4%
Over $200k	0.0%	29.8%	13.3%

$75k–$100k 100.0%

Range	% of households
$75k–$100k	100.0%
Median income	$0

Housing

Home values

Housing overview

Metric	Value
Median home value	$0
Median rent / month	$0
Owner occupied	0.0%
Renter occupied	100.0%
Vacant	31.1%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	0.0
Avg household size (owned)	0.00

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	0.0%
1980–1989	0.0%
1970–1979	0.0%
1960–1969	0.0%
1950–1959	68.9%
1940–1949	0.0%
1939 or earlier	31.1%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	68.9%
2 bedrooms	31.1%
3 bedrooms	0.0%
4 bedrooms	0.0%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	0.0%
2 vehicles	0.0%
3 or more	100.0%

Heating fuel

Fuel type	%
Electricity	100.0%

Households & families

Household type	Count	%
Married-couple family	0	0.0%
Cohabiting couple	0	0.0%
Male householder, no spouse	93	100.0%
Female householder, no spouse	0	0.0%
Households with children under 18	0	0.0%
Households with seniors (65+)	93	100.0%
Average household size	1.86

Marital status

Status	Male	Female
Never married	55.8%	100.0%
Married	16.6%	0.0%
Separated	6.1%	0.0%
Widowed	3.3%	0.0%
Divorced	18.1%	0.0%

Education

Less than 9th grade 5.9%

Some HS, no diploma 20.3%

HS graduate 33.7%

Some college, no degree 23.0%

Associate's degree 15.8%

Bachelor's degree 0.7%

Graduate / professional 0.6%

Metric	%
HS diploma or higher	73.8%
Bachelor's or higher	1.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	0	0.0%
High school	78	28.3%
College / grad school	198	71.7%

Employment

Industry of employment

Manufacturing 53.8%

Other services 46.2%

Occupation

Category	%
Management, business & arts	0.0%
Service	46.2%
Sales & office	0.0%
Natural resources & construction	53.8%
Production & transportation	0.0%

Employment type

Type	%
Private sector	53.8%
Government	0.0%
Self-employed	46.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	100.0%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 46.2%

Under 18 years 0.0%

18 and over 46.2%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	0.0%
Retirement income	0.0%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	33.4%
High blood pressure	27.5%
High cholesterol	24.6%
Diabetes	9.5%
Heart disease	4.5%
Stroke	2.5%
Asthma	8.8%
Arthritis	14.9%
Kidney disease	2.1%
Pulmonary disease	5.0%
Cancer	3.0%

Behavior / access	%
Smoking	20.3%
Binge drinking	24.8%
No physical activity	21.6%
Less than 7 hrs sleep	37.8%
Depression	14.3%
Fair or poor health	16.7%
Poor mental health	14.6%
Poor physical health	10.0%
No health insurance	20.1%
Visited doctor (checkup)	57.2%
Visited dentist	51.7%
Cholesterol screening	86.2%
Teeth loss	15.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	130	6.3%

Disability	%
Any disability	0.0%
Under 18	0.0%
18–64 years	0.0%
65 and over	0.0%

Health insurance coverage

Type	%
Private insurance	100.0%
Public insurance	100.0%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,054	100.0%
Spanish	227	11.1%
Other Indo-European	159	7.7%
Asian & Pacific Islander	21	1.0%
Other languages	33	1.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,587	77.3%
Born in same state	1,549	75.4%
Born in different state	1,186	57.7%
Foreign born	38	1.9%
Naturalized citizen	467	22.7%
Not a US citizen	95	20.3%

Ancestry

Ancestry	Count	%
French	78	3.8%
Italian	63	3.1%
Arab	37	1.8%
English	10	0.5%

Ancestry	Count	%
Polish	10	0.5%
Dutch	10	0.5%
Irish	6	0.3%

Technology access

Metric	% of households
Computer access	4.5%
Internet access	100.0%

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

Frequently asked questions about ZIP code 94964

What city is ZIP code 94964 in?

ZIP code 94964 is primarily assigned to San Quentin, California.

What county is ZIP code 94964 in?

ZIP code 94964 falls within Marin County, California.

What is the poverty rate in ZIP code 94964?

46% of residents in ZIP code 94964 live below the poverty line, above the national average.

What is the population of ZIP code 94964?

ZIP code 94964 has an estimated population of 2,054 residents, with a density of 4,504 people per square mile.

What timezone is ZIP code 94964 in?

ZIP code 94964 observes the PST timezone.