PlainZIP

Petrolia, CA

Single-footprint Census roll-up for Petrolia, CA: 1 USPS ZIP, population 425. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet PETROLIA-CA · Petrolia, CA 1 ZIPs · 425 pop · #21190/25278 · Humboldt County

INC-MID · RANK-BOTTOM · PHOTO-FINISH · BOOK-ONE · OWN-MID · POP-VILLAGE · SPREAD-UNK · HOME-HIGH

  • INC-MID $51,719
  • RANK-BOTTOM #21190/25278
  • PHOTO-FINISH ≈ Arcata
  • BOOK-ONE 1 ZIP
  • OWN-MID 70% owners
  • POP-VILLAGE 425
  • SPREAD-UNK Single-ZIP book
  • HOME-HIGH $566,200

Nearest income peer: Arcata, CA (+ $1,395 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Petrolia

Lowest/highest poles plus county-sharing cities nearest Petrolia on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Petrolia, CA sits among US cities with one of the lowest household incomes among US cities, on a village-scale population base, across a single-ZIP footprint.

16th pct
household income vs 25,278 US cities
425
city population (Census)
1
USPS ZIP codes covered
$51,719
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

Lower-income footing on only 1 ZIP ($51,719 average) · poverty 27.4%. The primary code (95558) carries the ACS household fields that matter.

Owner-occupancy sits in a mixed band (69.6%) - check the ZIP page's tenure split before treating Petrolia as a pure owner town.

Within California, Hornbrook is the closest lower-income city and Morongo Valley the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Petrolia.

Population concentration

Petrolia's single ZIP 95558 carries the town

Petrolia is published as a single USPS ZIP. Code 95558 is the entire residential footprint (425 ACS residents), so the city page and the ZIP page tell the same household story, open that ZIP for income, tenure, and commute detail.

Census ZBP business roll-up

Mid-pack ZBP load on Petrolia's one ZIP

Citywide ZBP: 9 establishments, 44 employees , annual payroll $2,136k (~21 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 95558 (9 units) .

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ZIP Codes in Petrolia, CA

These ZIP codes sit in Humboldt County, which covers 35 ZIP codes in all; 1 of them fall in Petrolia. See the Humboldt County roll-up →

Petrolia sits in the lower half of Humboldt County on income: Eureka, Arcata and Mckinleyville report more, Rio Dell, Garberville and Willow Creek report less. Bayside marks the far end of that range at $87,500, 69% above Petrolia.

ZIP Code Population Median income Establishments Density
95558 425 $51,719 9 1
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Petrolia roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Petrolia, .