ZIP Code 91803

91803 is one of California's ZIP codes, delivering to addresses in Alhambra, Los Angeles County.

City: Alhambra
County: Los Angeles County
State: California
Prefix: 918xx

Where this code sits

91803 is part of the 918xx range, the group of codes handled by one mail processing centre. Alhambra is served by 6 ZIP codes in total; the full list, with the county each falls in, is on the Alhambra page.

Alhambra California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 91803 delivers to without sharing its boundary.

626 Area code 626

ZIP codes nearest 91803

The ZIP codes whose reference points sit closest to 91803.
ZIP code	Distance	Delivers to
ZIP code 91801	1.4 mi	Alhambra, CA
ZIP code 91756	1.4 mi	Monterey Park, CA
ZIP code 91802	1.7 mi	Alhambra, CA
ZIP code 91804	1.7 mi	Alhambra, CA
ZIP code 91896	1.7 mi	Alhambra, CA
ZIP code 91899	1.7 mi	Alhambra, CA
ZIP code 91754	1.7 mi	Monterey Park, CA
ZIP code 90032	1.9 mi	Los Angeles, 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 91803, plotted from its record coordinates.

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

Scope ZIP code 91803. 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.