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California ZIP Codes
Contra Costa County
Bethel Island, CA
94511
94511 ZIP Code — Bethel Island, CA
Contra Costa County, California
ZIP code 94511 is located in
Bethel Island ,
California ,
within Contra Costa County .
It covers approximately 5.25 square miles and serves a population of
1,993 residents.
This is a standard ZIP code in the Pacific (PT) timezone,
served by area code 925 .
About ZIP code 94511
The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $475,400. Owner-occupancy sits near the national average at 73%.
The gap between median ($85,870) and mean household income suggests income inequality — a small number of higher earners pull the average up. Poverty affects 18% of residents, above the national average. 41% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is management, business, and professional, with construction as the leading industry. The average commute of 32 minutes is near the national average.
Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.
Overall, ZIP code 94511 reflects a community defined by economic challenges above the national average and a significant Social Security-dependent population.
94511 ZIP code map
View map of 94511
Cities in ZIP code 94511
Below are the cities the US Postal Service accepts for ZIP code 94511. Using any city not on this list may result in mail delivery delays.
Demographics
updated 05/2026
Population
Total population
1,993
Population density
380 / sq mi
State FIPS
06
County FIPS
013
Geography
Land area
5.25 sq mi
Water area
0.58 sq mi
Latitude
38.0534
Longitude
-121.6277
Timezone
Pacific (PT)
Area code
925
Economics
updated 05/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
46.2%
23.2%
32.6%
$50k – $100k
25.9%
25.1%
27.7%
$100k – $200k
23.7%
31.3%
26.4%
Over $200k
4.2%
20.4%
13.3%
Demographics & statistics
$85,870
Median household income
$475,400
Median home value
$1,369
Median monthly rent
25.0%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 299 15.0% 18 and over 1,694 85.0% 65 and over 552 27.7% Median age 55.4 years
Race & ethnicity
Native Hawaiian / Pacific Islander
1.6%
Group Count % White 1,416 58.9% Hispanic or Latino 413 17.2% Other race 346 14.4% Asian 125 5.2% Two or more races 67 2.8% Native Hawaiian / Pacific Islander 39 1.6%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
46.2%
23.2%
32.6%
$50k – $100k
25.9%
25.1%
27.7%
$100k – $200k
23.7%
31.3%
26.4%
Over $200k
4.2%
20.4%
13.3%
Range % of households Under $10k 8.1% $15k–$25k 8.0% $25k–$35k 6.9% $35k–$50k 5.1% $50k–$75k 5.2% $75k–$100k 23.8% $100k–$150k 12.7% $150k–$200k 9.0% $200k+ 21.3% Median income $85,870
Housing
Housing overview
Metric Value Median home value $475,400 Median rent / month $1,369 Owner occupied 73.2% Renter occupied 26.8% Vacant 23.5% Single-family detached 65.5% Large apartment buildings 0.0% Mobile homes 31.0% Median rooms 5.4 Avg household size (owned) 2.52
Year built
Era % 2020 or later 0.0% 2010–2019 13.4% 2000–2009 6.7% 1990–1999 0.0% 1980–1989 21.6% 1970–1979 32.3% 1960–1969 4.3% 1950–1959 7.8% 1940–1949 10.4% 1939 or earlier 3.5%
Bedrooms
Size % of units No bedroom (studio) 5.8% 1 bedroom 18.6% 2 bedrooms 15.7% 3 bedrooms 44.0% 4 bedrooms 15.9% 5+ bedrooms 0.0%
Vehicles per household
Vehicles % of households No vehicle 4.6% 1 vehicle 13.3% 2 vehicles 58.8% 3 or more 23.3%
Heating fuel
Fuel type % Utility gas 9.3% Electricity 50.1% Propane / LP gas 21.1% Fuel oil 3.2% Wood 6.5% Solar 1.0% No fuel used 4.6%
Households & families
Household type Count % Married-couple family 324 38.5% Cohabiting couple 68 8.1% Male householder, no spouse 247 29.3% Female householder, no spouse 203 24.1% Households with children under 18 144 17.1% Households with seniors (65+) 390 46.3% Average household size 2.37
Marital status
Status Male Female Never married 29.0% 0.0% Married 44.8% 47.0% Separated 3.5% 0.0% Widowed 2.8% 10.9% Divorced 19.8% 42.0%
Education
Some college, no degree
23.3%
Graduate / professional
14.6%
Metric % HS diploma or higher 85.7% Bachelor's or higher 25.0%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 0 0.0% Kindergarten 37 7.2% Elementary school 139 26.9% High school 123 23.8% College / grad school 218 42.2%
Employment
Industry of employment
Arts, food & hospitality
19.8%
Education & healthcare
11.4%
Professional & management
5.6%
Agriculture & mining
2.7%
Occupation
Category % Management, business & arts 31.0% Service 16.2% Sales & office 12.0% Natural resources & construction 30.4% Production & transportation 10.3%
Employment type
Type % Private sector 70.4% Government 0.0% Self-employed 22.6% Unpaid family workers 7.0%
Commute
Method % Drive alone 71.9% Carpool 20.1% Public transit 0.0% Walk 0.0% Work from home 8.0% Other means 0.0% Avg commute (minutes) 31.9
Poverty
Married-couple families
11.1%
Female-led households
0.0%
Income support
Source % of households Social Security 41.1% Retirement income 28.6% Supplemental Security 5.2% Cash public assistance 5.2% Food stamps / SNAP 9.5%
Health indicators
Condition % Obesity 32.0% High blood pressure 36.2% High cholesterol 36.6% Diabetes 12.7% Heart disease 8.9% Stroke 4.0% Asthma 10.0% Arthritis 31.3% Kidney disease 3.7% Pulmonary disease 9.3% Cancer 8.8%
Behavior / access % Smoking 14.0% Binge drinking 16.4% No physical activity 22.3% Less than 7 hrs sleep 30.7% Depression 18.2% Fair or poor health 17.4% Poor mental health 13.7% Poor physical health 12.8% No health insurance 10.1% Visited doctor (checkup) 69.1% Visited dentist 66.2% Cholesterol screening 93.3% Teeth loss 12.2%
Veterans & disability
Veterans Count % Civilian veterans 173 10.2%
Disability % Any disability 9.6% Under 18 0.0% 18–64 years 8.6% 65 and over 17.0%
Health insurance coverage
Type % Private insurance 63.7% Public insurance 46.0% No insurance 4.2% Uninsured under 19 0.0%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 1,993 100.0% Spanish 105 5.3% Other Indo-European 105 5.3% Asian & Pacific Islander 0 0.0% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 1,643 82.4% Born in same state 1,643 82.4% Born in different state 1,184 59.4% Foreign born 0 0.0% Naturalized citizen 350 17.6% Not a US citizen 224 64.0%
Ancestry
Ancestry Count % French 150 7.5% Italian 76 3.8% Polish 74 3.7%
Ancestry Count % English 63 3.2% Arab 29 1.5%
Technology access
Metric % of households Computer access 42.2% Internet access 100.0%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 94511
What city is ZIP code 94511 in?
ZIP code 94511 is primarily assigned to Bethel Island, California.
What county is ZIP code 94511 in?
ZIP code 94511 falls within Contra Costa County, California.
Does ZIP code 94511 have an older population?
28% of residents in ZIP code 94511 are 65 or older, above the national average of ~17%.
What is the poverty rate in ZIP code 94511?
18% of residents in ZIP code 94511 live below the poverty line, above the national average.
Does ZIP code 94511 have a large retiree population?
41% of households in ZIP code 94511 receive Social Security income, suggesting a significant retiree or disability population.
What is the typical home value in ZIP code 94511?
The median home value in ZIP code 94511 is $475,400.
What timezone is ZIP code 94511 in?
ZIP code 94511 observes the PST timezone.
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