ZIP Code 92304

92304 is one of California's ZIP codes, delivering to addresses in Amboy, San Bernardino County.

City: Amboy
County: San Bernardino County
State: California
Prefix: 923xx

Where this code sits

92304 is part of the 923xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Amboy.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 92304 delivers to without sharing its boundary.

ZIP codes nearest 92304

The ZIP codes whose reference points sit closest to 92304.
ZIP code	Distance	Delivers to
ZIP code 92332	9.7 mi	Essex, CA
ZIP code 92338	26 mi	Ludlow, CA
ZIP code 92278	29 mi	Twentynine Palms, CA
ZIP code 92277	34 mi	Twentynine Palms, CA
ZIP code 92252	43 mi	Joshua Tree, CA
ZIP code 92286	43 mi	Yucca Valley, CA
ZIP code 92284	48 mi	Yucca Valley, CA
ZIP code 92323	49 mi	Cima, 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 92304, plotted from its record coordinates.

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

Scope ZIP code 92304. 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.