Petrolia ZIP Codes — Humboldt County, CA

There is one unique ZIP code in Petrolia, California and it is 95558. Area code: 707.

ZIP codes

168.45

sq mi land

0.29

sq mi water

707

area code

Petrolia, CA ZIP code map

About Petrolia, CA

Petrolia, California, is a small, picturesque community located in Humboldt County. Known for its stunning coastal scenery and vibrant local culture, Petrolia offers a unique blend of rural charm and natural beauty. The town reflects a rich history and is a favorite destination for those looking to escape into nature's tranquility.

Location & geography

Petrolia is situated about 40 miles south of Eureka, along California's breathtaking Lost Coast. The town spans a land area of 168.45 square miles and has a water area of 0.29 square miles, highlighting its diverse terrain that includes hills and coastal views. Surrounding cities include Fortuna to the east at approximately 30 miles, Rohnerville to the southeast around 35 miles, and Cloverdale, located roughly 50 miles away.

Community & economy

The community of Petrolia is characterized by its tight-knit atmosphere and an appreciation for the outdoors. Residents engage mainly in agriculture, fishing, and tourism, which are the backbone of the local economy. Daily life in Petrolia is often centered around community events and access to outdoor activities, such as hiking and surfing.

Transportation

Petrolia is accessed via California State Route 1, which runs along the coast and connects to various other locations in the region. The nearest named airport is the Arcata-Eureka Airport, located about 45 miles north of Petrolia. Although public transit options may be limited, local roads provide scenic drives for residents and visitors alike.

History

Founded in the late 19th century during the oil boom, Petrolia quickly developed as a center for the petroleum industry. Over the years, the town has transitioned to focus more on agriculture and tourism while still celebrating its historical roots. Notable events include the annual Petrolia Summer Festival, which celebrates local culture and history.

Did you know?

A surprising fact about Petrolia is that it is home to some of California's last remaining unspoiled coastline, making it a hidden gem for nature lovers. Additionally, the nearby Lost Coast is one of the state's least visited regions, offering pristine landscapes for outdoor enthusiasts.

ZIP codes for Petrolia, CA (1)

ZIP code	City	County	Map
95558	Petrolia	Humboldt	View map

Demographics & statistics

246

Population

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

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%
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	%
High blood pressure	33.2%
High cholesterol	33.4%
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	%
Binge drinking	19.7%
No physical activity	19.1%
Less than 7 hrs sleep	33.4%
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%
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

What ZIP codes does Petrolia, CA have?

Petrolia, CA has one ZIP code: 95558. Each ZIP code serves a distinct delivery area within the city and surrounding region.