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 Low-density area
- $51,719
- Median income Below-median income area
- $566,200
- Median home value Above-median home value
- 24.6%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
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 average California ZIP), while per-capita income is $32,795. The poverty rate is 27.4%, so the area-level income figures should not be treated as typical household experience. Home values sit below the statewide ZIP benchmark: the median is $566,200 (27% below the average California ZIP); owner occupancy is 69.6%.
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 -. No nearby ZIP peer set is available for this delivery area, so the California and national benchmarks above are the appropriate context for 95558.
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
Who lives in ZIP 95558?
50.6
Median Age
53.0%
Male
47.0%
Female
6.5%
Foreign-Born
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 ZIP avg
$32,795
Per Capita Income
27.4%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 95558 ranks among California ZIPs
Petrolia, CA household income vs. every California ZIP code
Median household income among 1,583 reporting California ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$51,719 8th percentile higher than 8% of 1,583 California ZIPs
Each bar is a $20K-wide band; taller bars hold more California 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
203housing units
203
Total Housing Units
125
Occupied Units
78
Vacant Units
1.84
Avg Household Size
Occupancy Type
$566,200
Median Home Value
-27% vs state ZIP avg
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.
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 95558, both outside CA so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Humboldt County
Related Areas
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.
Related
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What to do with ZIP 95558's numbers, next.
- See how ZIP 95558 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Petrolia, CA ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.