PlainZIP

Petrolia, CA · standard

ZIP Code 95558

Humboldt County, California - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

425
1/sq mi
$51,719
Median income
$566,200
Median home value
24.6%
Bachelor's or higher

The verdict

Petrolia pairs one of the lowest household incomes in the country with top-decile home values, in a rural, homeowner-dominated area.

16th pct
household income, US ZIPs
Top 10%
home value, US ZIPs
1
people per sq mi
70%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 95558 against every reporting US ZIP.

ZIP code 95558 is a sparsely populated ZIP (a standard USPS delivery area) in Petrolia, Humboldt County, California, home to just 425 residents across 531.3 square miles, a density of 1 people per square mile, in the Los Angeles time zone.

ZIP 95558 reports a modest median household income of $51,719 (49% below the California average), while per-capita income is $32,795. The poverty rate stands at 27.4% and the unemployment rate at 0.0%. On housing, the median home value is $566,200 (27% below the state average) with median rent at - per month, and 69.6% of occupied units are owner-occupied.

Educational attainment sits below the national norm: 24.6% of adults hold a bachelor's degree or higher, the median age is 50.6, and the average commute is -. Compare these figures to the California and national benchmarks above rather than reading 95558's numbers in isolation.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 95558, Petrolia, CA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

425

Population

531.3

Area (sq mi)

1

People / sq mi

Los Angeles

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 95558?

50.6

Median Age

53.0%

Male

47.0%

Female

6.5%

Foreign-Born

White 78.3%
African American 0.0%
Asian 1.7%
American Indian or Alaska Native 12.6%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 7.4%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$51,719

Median Household Income

-49% vs state

$32,795

Per Capita Income

27.4%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 95558 ranks nationally

Petrolia, CA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$51,719 16th percentile higher than 16% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). This entry sits in this band. $60,000–$80,000: 9,980 US ZIPs (33%). Above this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 44.2%
Bachelor's Degree or Higher 24.6%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

203

Total Housing Units

125

Occupied Units

78

Vacant Units

1.84

Avg Household Size

Occupancy Type

Owner 69.6%
Renter 30.4%

$566,200

Median Home Value

-27% vs state

1973

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 9 business establishments in ZIP 95558, employing approximately 44 people with a combined annual payroll of $2,136,000.

9

Businesses

44

Employees

$2.1M

Annual Payroll

0

Industry Sectors

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

More ZIP Codes in Humboldt County

95503 standard
Eureka, CA
Pop: 24,152
95501 standard
Eureka, CA
Pop: 23,976
95521 standard
Arcata, CA
Pop: 20,199
95519 standard
Mckinleyville, CA
Pop: 17,432
95540 standard
Fortuna, CA
Pop: 13,657
95546 standard
Hoopa, CA
Pop: 3,494

Related Areas

Humboldt County Petrolia, CA California

Frequently Asked Questions

What county is ZIP code 95558 in? ▼
ZIP code 95558 (Petrolia) is located in Humboldt County, California. Humboldt County contains multiple ZIP codes, see the full list at /counties/humboldt-ca.
What is the population of ZIP code 95558? ▼
ZIP code 95558 in Petrolia, CA has a population of 425 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 95558? ▼
The median household income in ZIP 95558 is $51,719, which is 32% below the national average of $76,288.
What is the average home value in ZIP 95558? ▼
The median home value in ZIP 95558 is $566,200, which is 104% above the national average of $278,155.
What is the demographic makeup of ZIP 95558? ▼
The largest racial group in ZIP 95558 is White at 78.3%.
How many businesses are in ZIP code 95558? ▼
ZIP code 95558 has 9 business establishments employing approximately 44 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 95558? ▼
In ZIP code 95558, 44.2% of residents aged 25+ have a high school diploma or higher, and 24.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 95558? ▼
In ZIP code 95558, approximately 69.6% of occupied housing units are owner-occupied and 30.4% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 95558? ▼
The poverty rate in ZIP code 95558 is 27.4% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.