ZIP Code 95558

95558 is one of California's ZIP codes, delivering to addresses in Petrolia, Humboldt County.

City: Petrolia
County: Humboldt County
State: California
Prefix: 955xx

Where this code sits

95558 is part of the 955xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Petrolia.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 95558 delivers to without sharing its boundary.

ZIP codes nearest 95558

The ZIP codes whose reference points sit closest to 95558.
ZIP code	Distance	Delivers to
ZIP code 95545	7.5 mi	Honeydew, CA
ZIP code 95565	15 mi	Scotia, CA
ZIP code 95562	16 mi	Rio Dell, CA
ZIP code 95571	16 mi	Weott, CA
ZIP code 95536	17 mi	Ferndale, CA
ZIP code 95569	17 mi	Redcrest, CA
ZIP code 95547	20 mi	Hydesville, CA
ZIP code 95528	20 mi	Carlotta, CA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 95558, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 95558. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.