95558 ZIP Code — Petrolia, CA

Humboldt County, California

ZIP code 95558 is located in Petrolia, California, within Humboldt County. It covers approximately 168.45 square miles and serves a population of 246 residents. This is a standard ZIP code in the Pacific (PT) timezone, served by area code 707.

About ZIP code 95558

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $1,041,700. Owner-occupancy sits near the national average at 69%.

The gap between median ($42,917) and mean household income suggests income inequality — a small number of higher earners pull the average up. Poverty affects 28% of residents, above the national average. 59% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. An above-average commute of 37 minutes suggests many residents work outside the immediate area. Remote work is prevalent — 56% of workers work from home.

Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.

Overall, ZIP code 95558 reflects a community defined by economic challenges above the national average, a high rate of remote workers, and a significant Social Security-dependent population.

246

population

168.45

sq mi land

Standard

ZIP type

Pacific (PT)

timezone

95558 ZIP code map

Cities in ZIP code 95558

Below are the cities the US Postal Service accepts for ZIP code 95558. Using any city not on this list may result in mail delivery delays.

City	Status
Petrolia	Preferred

Nearby ZIP codes

95536 Ferndale (13.4 mi) 95562 Rio Dell (13.8 mi) 95565 Scotia (15.2 mi) 95554 Myers Flat (16.8 mi) 95569 Redcrest (18.1 mi) 95547 Hydesville (19.3 mi) 95528 Carlotta (19.4 mi) 95542 Garberville (19.7 mi)

Demographics updated 05/2026

Population
Total population	246
Population density	1 / sq mi
State FIPS	06
County FIPS	023

Geography
Land area	168.45 sq mi
Water area	0.29 sq mi
Latitude	40.2868
Longitude	-124.2088
Timezone	Pacific (PT)
Area code	707

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	45.0%	50.6%	32.6%
$50k – $100k	31.7%	27.7%	27.7%
$100k – $200k	16.4%	17.1%	26.4%
Over $200k	6.9%	4.5%	13.3%

Demographics & statistics

246

Population

People per sq mi

64.5

Median age

$42,917

Median household income

$40,704

Per capita income

$1,041,700

Median home value

Median monthly rent

69.2%

Home ownership

27.6%

Poverty rate

1.8%

Unemployment

172

Housing units

25.2%

Bachelor's or higher

Age distribution

Male Female

10–14

15–19

25–34

35–44

45–54

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	27	11.0%
18 and over	219	89.0%
65 and over	119	48.4%
Median age	64.5 years

Race & ethnicity

White 85.8%

American Indian / Alaska Native 4.3%

Asian 3.2%

Hispanic or Latino 2.8%

Other race 2.8%

Two or more races 1.2%

Group	Count	%
White	217	85.8%
American Indian / Alaska Native	11	4.3%
Asian	8	3.2%
Hispanic or Latino	7	2.8%
Other race	7	2.8%
Two or more races	3	1.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	45.0%	50.6%	32.6%
$50k – $100k	31.7%	27.7%	27.7%
$100k – $200k	16.4%	17.1%	26.4%
Over $200k	6.9%	4.5%	13.3%

Under $10k 10.5%

$10k–$15k 14.3%

$15k–$25k 4.5%

$25k–$35k 9.8%

$35k–$50k 18.0%

$50k–$75k 7.5%

$75k–$100k 21.1%

$100k–$150k 6.0%

$150k–$200k 3.8%

$200k+ 4.5%

Range	% of households
Under $10k	10.5%
$10k–$15k	14.3%
$15k–$25k	4.5%
$25k–$35k	9.8%
$35k–$50k	18.0%
$50k–$75k	7.5%
$75k–$100k	21.1%
$100k–$150k	6.0%
$150k–$200k	3.8%
$200k+	4.5%
Median income	$42,917

Housing

Home values

$200k–$300k 6.5%

$300k–$500k 7.6%

$500k–$1M 33.7%

$1M+ 52.2%

Housing overview

Metric	Value
Median home value	$1,041,700
Median rent / month	$0
Owner occupied	69.2%
Renter occupied	30.8%
Vacant	37.6%
Single-family detached	86.9%
Large apartment buildings	0.0%
Mobile homes	10.3%
Median rooms	3.6
Avg household size (owned)	2.11

Year built

Era	%
2020 or later	0.0%
2010–2019	11.3%
2000–2009	8.9%
1990–1999	8.0%
1980–1989	13.1%
1970–1979	31.5%
1960–1969	3.8%
1950–1959	8.5%
1940–1949	6.6%
1939 or earlier	8.5%

Bedrooms

Size	% of units
No bedroom (studio)	9.4%
1 bedroom	28.6%
2 bedrooms	41.3%
3 bedrooms	10.8%
4 bedrooms	9.9%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	49.6%
2 vehicles	19.5%
3 or more	30.8%

Heating fuel

Fuel type	%
Utility gas	8.3%
Electricity	10.5%
Propane / LP gas	1.5%
Wood	75.9%
Solar	3.8%

Households & families

Household type	Count	%
Married-couple family	30	22.6%
Cohabiting couple	31	23.3%
Male householder, no spouse	38	28.6%
Female householder, no spouse	34	25.6%
Households with children under 18	22	16.5%
Households with seniors (65+)	75	56.4%
Average household size	1.85

Marital status

Status	Male	Female
Never married	20.2%	14.3%
Married	38.5%	40.2%
Separated	0.0%	5.4%
Widowed	0.0%	6.3%
Divorced	41.3%	33.9%

Education

Less than 9th grade 0.5%

Some HS, no diploma 3.3%

HS graduate 20.6%

Some college, no degree 38.3%

Associate's degree 12.1%

Bachelor's degree 8.9%

Graduate / professional 16.4%

Metric	%
HS diploma or higher	96.3%
Bachelor's or higher	25.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	25	92.6%
High school	2	7.4%
College / grad school	0	0.0%

Employment

Industry of employment

Agriculture & mining 28.2%

Arts, food & hospitality 16.4%

Construction 12.7%

Professional & management 10.9%

Education & healthcare 10.9%

Other services 9.1%

Manufacturing 6.4%

Retail trade 5.5%

Occupation

Category	%
Management, business & arts	55.5%
Service	16.4%
Sales & office	11.8%
Natural resources & construction	4.5%
Production & transportation	11.8%

Employment type

Type	%
Private sector	46.4%
Government	8.2%
Self-employed	40.0%
Unpaid family workers	5.5%

Commute

Method	%
Drive alone	31.8%
Carpool	9.1%
Public transit	0.0%
Walk	0.0%
Work from home	56.4%
Other means	2.7%
Avg commute (minutes)	37.0

Poverty

All people 27.6%

Under 18 years 25.9%

18 and over 27.9%

Married-couple families 0.0%

Female-led households 50.0%

Income support

Source	% of households
Social Security	58.6%
Retirement income	12.0%
Supplemental Security	6.0%
Cash public assistance	0.0%
Food stamps / SNAP	15.8%

Health indicators

Condition	%
Obesity	31.0%
High blood pressure	33.2%
High cholesterol	33.4%
Diabetes	10.6%
Heart disease	7.4%
Stroke	3.4%
Asthma	10.4%
Arthritis	27.0%
Kidney disease	3.1%
Pulmonary disease	8.5%
Cancer	7.4%

Behavior / access	%
Smoking	15.6%
Binge drinking	19.7%
No physical activity	19.1%
Less than 7 hrs sleep	33.4%
Depression	19.6%
Fair or poor health	15.2%
Poor mental health	15.0%
Poor physical health	11.8%
No health insurance	8.5%
Visited doctor (checkup)	67.7%
Visited dentist	63.9%
Cholesterol screening	91.7%
Teeth loss	11.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	4	1.8%

Disability	%
Any disability	9.8%
Under 18	0.0%
18–64 years	8.0%
65 and over	13.4%

Health insurance coverage

Type	%
Private insurance	56.1%
Public insurance	59.3%
No insurance	4.1%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	246	100.0%
Spanish	5	2.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	5	2.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	226	91.9%
Born in same state	226	91.9%
Born in different state	148	60.2%
Foreign born	0	0.0%
Naturalized citizen	20	8.1%
Not a US citizen	5	25.0%

Ancestry

Ancestry	Count	%
French	57	23.2%
Polish	10	4.1%
Italian	9	3.7%

Ancestry	Count	%
Arab	8	3.3%
English	3	1.2%

Technology access

Metric	% of households
Computer access	54.1%
Internet access	82.0%

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

Frequently asked questions about ZIP code 95558

What city is ZIP code 95558 in?

ZIP code 95558 is primarily assigned to Petrolia, California.

What county is ZIP code 95558 in?

ZIP code 95558 falls within Humboldt County, California.

Does ZIP code 95558 have an older population?

48% of residents in ZIP code 95558 are 65 or older, above the national average of ~17%.

Does ZIP code 95558 have a large retiree population?

59% of households in ZIP code 95558 receive Social Security income, suggesting a significant retiree or disability population.

What is the poverty rate in ZIP code 95558?

28% of residents in ZIP code 95558 live below the poverty line, above the national average.

What is the typical home value in ZIP code 95558?

The median home value in ZIP code 95558 is $1,041,700.

What timezone is ZIP code 95558 in?

ZIP code 95558 observes the PST timezone.