ZIP Code 92377

92377 is one of California's ZIP codes, delivering to addresses in Rialto, San Bernardino County.

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

Where this code sits

92377 is part of the 923xx range, the group of codes handled by one mail processing centre. Rialto is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Rialto page.

Rialto California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 92377 delivers to without sharing its boundary.

ZIP codes nearest 92377

The ZIP codes whose reference points sit closest to 92377.
ZIP code	Distance	Delivers to
ZIP code 92336	3.3 mi	Fontana, CA
ZIP code 92376	3.3 mi	Rialto, CA
ZIP code 92407	4.2 mi	San Bernardino, CA
ZIP code 92334	4.8 mi	Fontana, CA
ZIP code 92331	5.5 mi	Fontana, CA
ZIP code 92411	5.5 mi	San Bernardino, CA
ZIP code 92405	5.9 mi	San Bernardino, CA
ZIP code 92335	6.0 mi	Fontana, 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 92377, plotted from its record coordinates.

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

Scope ZIP code 92377. 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.