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California ZIP Codes
Tuolumne County
Big Oak Flat, CA
95305
95305 ZIP Code — Big Oak Flat, CA
Tuolumne County, California
ZIP code 95305 is located in
Big Oak Flat ,
California ,
within Tuolumne County .
It covers approximately 58.26 square miles and serves a population of
158 residents.
This is a standard ZIP code in the Pacific (PT) timezone,
served by area code 209 .
95305 ZIP code map
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Cities in ZIP code 95305
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Demographics
updated 06/2026
Population
Total population
158
Population density
3 / sq mi
State FIPS
06
County FIPS
109
Geography
Land area
58.26 sq mi
Water area
2.25 sq mi
Latitude
37.8209
Longitude
-120.2592
Timezone
Pacific (PT)
Area code
209
Demographics & statistics
$0
Median household income
Age distribution
Age summary
Group Count %
Under 18 0 0.0%
18 and over 158 100.0%
65 and over 87 55.1%
Median age 67.3 years
Race & ethnicity
Group Count %
White 85 53.8%
Asian 44 27.8%
Two or more races 29 18.4%
Household income
Range % of households
$35k–$50k 51.8%
$75k–$100k 48.2%
Median income $0
Housing
Housing overview
Metric Value
Median home value $0
Median rent / month $0
Owner occupied 48.2%
Renter occupied 51.8%
Vacant 57.3%
Single-family detached 100.0%
Large apartment buildings 0.0%
Mobile homes 0.0%
Median rooms 5.3
Avg household size (owned) 2.07
Year built
Era %
2020 or later 0.0%
2010–2019 0.0%
2000–2009 0.0%
1990–1999 0.0%
1980–1989 9.2%
1970–1979 70.2%
1960–1969 0.0%
1950–1959 0.0%
1940–1949 0.0%
1939 or earlier 20.6%
Bedrooms
Size % of units
No bedroom (studio) 0.0%
1 bedroom 22.1%
2 bedrooms 20.6%
3 bedrooms 9.2%
4 bedrooms 48.1%
5+ bedrooms 0.0%
Vehicles per household
Vehicles % of households
No vehicle 0.0%
1 vehicle 51.8%
2 vehicles 0.0%
3 or more 48.2%
Heating fuel
Fuel type %
Electricity 48.2%
Propane / LP gas 51.8%
Households & families
Household type Count %
Married-couple family 56 100.0%
Cohabiting couple 0 0.0%
Male householder, no spouse 0 0.0%
Female householder, no spouse 0 0.0%
Households with children under 18 0 0.0%
Households with seniors (65+) 56 100.0%
Average household size 2.04
Marital status
Status Male Female
Never married 43.1% 0.0%
Married 56.9% 100.0%
Separated 0.0% 0.0%
Widowed 0.0% 0.0%
Divorced 0.0% 0.0%
Education
Some college, no degree
81.6%
Graduate / professional
0.0%
Metric %
HS diploma or higher 100.0%
Bachelor's or higher 0.0%
School enrollment (ages 3–17)
Type Count %
Nursery / preschool 0 0.0%
Kindergarten 0 0.0%
Elementary school 0 0.0%
High school 0 0.0%
College / grad school 0 0.0%
Employment
Occupation
Category %
Management, business & arts 100.0%
Service 0.0%
Sales & office 0.0%
Natural resources & construction 0.0%
Production & transportation 0.0%
Employment type
Type %
Private sector 100.0%
Government 0.0%
Self-employed 0.0%
Unpaid family workers 0.0%
Commute
Method %
Drive alone 0.0%
Carpool 100.0%
Public transit 0.0%
Walk 0.0%
Work from home 0.0%
Other means 0.0%
Avg commute (minutes) 0.0
Poverty
Married-couple families
0.0%
Female-led households
0.0%
Income support
Source % of households
Social Security 100.0%
Retirement income 100.0%
Supplemental Security 48.2%
Cash public assistance 0.0%
Food stamps / SNAP 0.0%
Health indicators
Condition %
Obesity 28.8%
High blood pressure 32.1%
High cholesterol 33.7%
Diabetes 10.0%
Heart disease 6.8%
Stroke 3.1%
Asthma 10.4%
Arthritis 25.9%
Kidney disease 3.0%
Pulmonary disease 7.6%
Cancer 7.1%
Behavior / access %
Smoking 14.0%
Binge drinking 18.7%
No physical activity 18.3%
Less than 7 hrs sleep 30.4%
Depression 20.1%
Fair or poor health 14.3%
Poor mental health 15.3%
Poor physical health 11.3%
No health insurance 8.1%
Visited doctor (checkup) 68.4%
Visited dentist 66.6%
Cholesterol screening 92.0%
Teeth loss 11.2%
Veterans & disability
Veterans Count %
Civilian veterans 0 0.0%
Disability %
Any disability 53.8%
Under 18 0.0%
18–64 years 38.0%
65 and over 66.7%
Health insurance coverage
Type %
Private insurance 63.3%
Public insurance 72.2%
No insurance 0.0%
Uninsured under 19 0.0%
Language & origin
Language spoken at home (age 5+)
Language Count %
English only 158 100.0%
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) 158 100.0%
Born in same state 158 100.0%
Born in different state 158 100.0%
Foreign born 0 0.0%
Naturalized citizen 0 0.0%
Not a US citizen 0 0.0%
Ancestry
Ancestry Count %
French 114 72.2%
Irish 29 18.4%
Ancestry Count %
Italian 27 17.1%
Technology access
Metric % of households
Computer access 35.4%
Internet access 48.2%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 95305
What city is ZIP code 95305 in?
ZIP code 95305 is primarily assigned to Big Oak Flat, California.
What county is ZIP code 95305 in?
ZIP code 95305 falls within Tuolumne County, California.
Does ZIP code 95305 have a large retiree population?
100% of households in ZIP code 95305 receive Social Security income, suggesting a significant retiree or disability population.
Does ZIP code 95305 have an older population?
55% of residents in ZIP code 95305 are 65 or older, above the national average of ~17%.
What is the population of ZIP code 95305?
ZIP code 95305 has an estimated population of 158 residents, with a density of 3 people per square mile.
What timezone is ZIP code 95305 in?
ZIP code 95305 observes the PST timezone.
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