95558 ZIP Code, Petrolia, CA
95558 is a ZIP code in Petrolia, California in Humboldt County. It covers 168 square miles of land. The closest ZIP codes are 95545, 95562 and 95536. 230 people live here in 125 households, fewer than in most California ZIP codes. It is rural, with fewer than 100 people per square mile, and owners and renters are mixed (70% own). Median household income is $51,719, well below the California median of $99,122; the median age is 50.6, older than most ZIP codes.
Quick facts
- Mailing city: Petrolia, CA
- County: Humboldt County
- Land area: 168 sq mi
- Population: 230
- Median household income: $51,719
- Carrier routes: 1 (42 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 230 |
| Households | 125 |
| Median household income | $51,719 |
| Income per person | $32,795 |
| Median age | 50.6 |
| Homeowners | 69.6% |
| Median home value | $566,200 |
| Median rent | not published |
| Bachelor's degree or higher | 24.6% |
| Average commute (minutes) | 23.8 |
| Households with kids under 18 | 19.2% |
| Moved in the past year | 13.5% |
| Below the poverty line | 27.4% |
| Broadband internet | 80.0% |
| Speak a non-English language at home | 0.0% |
Household income
| % of households | Value |
|---|---|
| <$10K | 0.0% |
| $10–15K | 16.0% |
| $15–25K | 3.2% |
| $25–35K | 5.6% |
| $35–50K | 20.8% |
| $50–75K | 15.2% |
| $75–100K | 24.0% |
| $100–150K | 12.8% |
| $150–200K | 0.0% |
| $200K+ | 2.4% |
Age
| % of all residents | Value |
|---|---|
| <10 | 4.8% |
| 10–19 | 8.7% |
| 20–24 | 0.0% |
| 25–34 | 3.5% |
| 35–44 | 13.5% |
| 45–54 | 23.0% |
| 55–64 | 10.0% |
| 65–74 | 20.4% |
| 75+ | 16.1% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 21.2% |
| Owned outright | 21.7% |
| Rented | 18.7% |
| Vacant | 38.4% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 89.2% |
| Townhome | 0.0% |
| 2–4 units | 0.0% |
| 5–19 units | 1.5% |
| 20+ units | 0.0% |
| Mobile / other | 9.4% |
Businesses in 95558
9 business establishments with 44 employees (ZIP Codes Business Patterns 2023).
EDDM carrier routes
95558 has 1 USPS carrier routes with 42 residential and 1 business mailboxes. Open the EDDM route map.
Carrier routes in 95558
95558 has 1 USPS carrier routes (1 highway contract (H)) with 42 residential and 1 business mailboxes. Routes range from 42 homes (H061) to 42 homes (H061); the median route has 42 homes. The Census counted 125 households in 95558 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 0 |
| 500–749 | 0 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Every carrier route in 95558
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| H061 | Highway contract | 42 | 1 | $74,207 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 95558 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 95545 (10.6 mi)
- 95562 — Rio Dell city, CA (11.1 mi)
- 95536 — Ferndale city, CA (11.6 mi)
- 95565 — Scotia CDP, CA (15.3 mi)
- 95571 — Weott CDP, CA (16.8 mi)
- 95540 — Fortuna city, CA (17.4 mi)
- 95547 — Hydesville CDP, CA (18.7 mi)
- 95528 (20.6 mi)
Areas that include 95558
- Petrolia, CA ZIP codes — 1 ZIP code
- Humboldt County ZIP codes — 35 ZIP codes
- California ZIP code data
Mail every home in 95558
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 95558, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 95558 in?
- 95558 is a Petrolia, CA mailing address. None of its land lies inside a Census-defined city or community.
- What county is 95558 in?
- 95558 is in Humboldt County.
- What is the population of 95558?
- About 230 people (±114), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 548.
- What is the median household income in 95558?
- $51,719 (±$38,051), compared with $99,122 for California as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 95558?
- 1 USPS carrier routes with 42 residential and 1 business mailboxes (43 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 95558?
- The closest, measured center to center: 95545 (10.6 mi), 95562 (11.1 mi, Rio Dell), 95536 (11.6 mi, Ferndale), 95565 (15.3 mi, Scotia), 95571 (16.8 mi, Weott) and 95540 (17.4 mi, Fortuna).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.