94940 ZIP Code — Marshall, CA

Marin County, California

ZIP code 94940 is located in Marshall, California, within Marin County. It covers approximately 26.20 square miles and serves a population of 260 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 707.

About ZIP code 94940

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $2,000,000. Owner-occupancy sits near the national average at 53%.

The dominant occupation class is sales and office, with professional and management as the leading industry. The average commute of 32 minutes is near the national average.

Educational attainment is high — 100% of residents hold a bachelor's degree or higher, well above the national average of 33%.

260

population

26.20

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

94940 ZIP code map

Cities in ZIP code 94940

Below are the cities the US Postal Service accepts for ZIP code 94940. Using any city not on this list may result in mail delivery delays.

City	Status
Marshall	Preferred

Nearby ZIP codes

94952 Petaluma (5.4 mi) 94937 Inverness (6 mi) 94972 Valley Ford (8.5 mi) 94922 Bodega (10 mi) 94923 Bodega Bay (13.1 mi) 94926 Rohnert Park (13.3 mi) 94931 Cotati (13.3 mi) 94999 Petaluma (13.9 mi) 94956 Point Reyes Station (14 mi) 95472 Sebastopol (14.1 mi) 94928 Rohnert Park (14.4 mi) 94946 Nicasio (15 mi)

Demographics updated 06/2026

Population
Total population	260
Population density	10 / sq mi
State FIPS	06
County FIPS	041

Geography
Land area	26.20 sq mi
Water area	4.70 sq mi
Latitude	38.1973
Longitude	-122.8877
Timezone	Pacific (PT)
Area code	707

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.2%	21.4%	32.6%
$50k – $100k	22.2%	21.0%	27.7%
$100k – $200k	9.9%	27.8%	26.4%
Over $200k	45.7%	29.8%	13.3%

Demographics & statistics

260

Population

People per sq mi

57.2

Median age

Median household income

$119,903

Per capita income

$2,000,000

Median home value

Median monthly rent

53.4%

Home ownership

0.0%

Poverty rate

0.0%

Unemployment

155

Housing units

100.0%

Bachelor's or higher

Age distribution

Male Female

10–14

15–19

20–24

45–54

55–59

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	41	15.8%
18 and over	219	84.2%
65 and over	50	19.2%
Median age	57.2 years

Race & ethnicity

White 100%

Group	Count	%
White	260	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	22.2%	21.4%	32.6%
$50k – $100k	22.2%	21.0%	27.7%
$100k – $200k	9.9%	27.8%	26.4%
Over $200k	45.7%	29.8%	13.3%

$35k–$50k 46.6%

$50k–$75k 9.3%

$75k–$100k 8.5%

$200k+ 35.6%

Range	% of households
$35k–$50k	46.6%
$50k–$75k	9.3%
$75k–$100k	8.5%
$200k+	35.6%
Median income	$0

Housing

Home values

$500k–$1M 33.3%

$1M+ 66.7%

Housing overview

Metric	Value
Median home value	$2,000,000
Median rent / month	$0
Owner occupied	53.4%
Renter occupied	46.6%
Vacant	43.8%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	4.5
Avg household size (owned)	3.25

Year built

Era	%
2020 or later	0.0%
2010–2019	5.2%
2000–2009	0.0%
1990–1999	0.0%
1980–1989	0.0%
1970–1979	0.0%
1960–1969	0.0%
1950–1959	25.7%
1940–1949	0.0%
1939 or earlier	69.0%

Bedrooms

Size	% of units
No bedroom (studio)	26.2%
1 bedroom	0.0%
2 bedrooms	21.4%
3 bedrooms	41.9%
4 bedrooms	5.2%
5+ bedrooms	5.2%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	46.6%
2 vehicles	27.1%
3 or more	26.3%

Heating fuel

Fuel type	%
Propane / LP gas	100.0%

Households & families

Household type	Count	%
Married-couple family	52	44.1%
Cohabiting couple	0	0.0%
Male householder, no spouse	0	0.0%
Female householder, no spouse	66	55.9%
Households with children under 18	32	27.1%
Households with seniors (65+)	31	26.3%
Average household size	2.20

Marital status

Status	Male	Female
Never married	51.8%	55.0%
Married	48.2%	45.0%
Separated	0.0%	0.0%
Widowed	0.0%	0.0%
Divorced	0.0%	0.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 0.0%

HS graduate 0.0%

Some college, no degree 0.0%

Associate's degree 0.0%

Bachelor's degree 81.9%

Graduate / professional 18.1%

Metric	%
HS diploma or higher	100.0%
Bachelor's or higher	100.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	10	24.4%
High school	31	75.6%
College / grad school	0	0.0%

Employment

Industry of employment

Professional & management 46.4%

Education & healthcare 25.6%

Retail trade 15.5%

Agriculture & mining 6.5%

Finance & real estate 6.0%

Occupation

Category	%
Management, business & arts	38.7%
Service	13.1%
Sales & office	48.2%
Natural resources & construction	0.0%
Production & transportation	0.0%

Employment type

Type	%
Private sector	73.8%
Government	12.5%
Self-employed	13.7%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	93.5%
Carpool	0.0%
Public transit	0.0%
Walk	6.5%
Work from home	0.0%
Other means	0.0%
Avg commute (minutes)	31.8

Poverty

All people 0.0%

Under 18 years 0.0%

18 and over 0.0%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	16.9%
Retirement income	8.5%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	26.3%
High blood pressure	30.0%
High cholesterol	34.0%
Diabetes	9.8%
Heart disease	6.6%
Stroke	2.9%
Asthma	9.7%
Arthritis	27.1%
Kidney disease	3.0%
Pulmonary disease	6.6%
Cancer	8.4%

Behavior / access	%
Smoking	10.2%
Binge drinking	17.1%
No physical activity	15.8%
Less than 7 hrs sleep	27.2%
Depression	17.4%
Fair or poor health	12.1%
Poor mental health	12.3%
Poor physical health	9.9%
No health insurance	7.6%
Visited doctor (checkup)	68.4%
Visited dentist	72.5%
Cholesterol screening	94.8%
Teeth loss	7.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	0	0.0%

Disability	%
Any disability	4.2%
Under 18	26.8%
18–64 years	0.0%
65 and over	0.0%

Health insurance coverage

Type	%
Private insurance	87.7%
Public insurance	31.5%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	260	100.0%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	260	100.0%
Born in same state	260	100.0%
Born in different state	178	68.5%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	98	37.7%
Italian	54	20.8%

Ancestry	Count	%
Polish	10	3.8%

Technology access

Metric	% of households
Computer access	45.4%
Internet access	100.0%

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

Frequently asked questions about ZIP code 94940

What city is ZIP code 94940 in?

ZIP code 94940 is primarily assigned to Marshall, California.

What county is ZIP code 94940 in?

ZIP code 94940 falls within Marin County, California.

How educated is the population of ZIP code 94940?

100% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the typical home value in ZIP code 94940?

The median home value in ZIP code 94940 is $2,000,000.

What is the population of ZIP code 94940?

ZIP code 94940 has an estimated population of 260 residents, with a density of 10 people per square mile.

What timezone is ZIP code 94940 in?

ZIP code 94940 observes the PST timezone.