ZIP Code 91024

91024 is one of California's ZIP codes, delivering to addresses in Sierra Madre, Los Angeles County.

City: Sierra Madre
County: Los Angeles County
State: California
Prefix: 910xx

Where this code sits

91024 is part of the 910xx range, the group of codes handled by one mail processing centre. Sierra Madre is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Sierra Madre page.

Sierra Madre California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 91024 delivers to without sharing its boundary.

626 Area code 626

ZIP codes nearest 91024

The ZIP codes whose reference points sit closest to 91024.
ZIP code	Distance	Delivers to
ZIP code 91025	0.2 mi	Sierra Madre, CA
ZIP code 91066	2.0 mi	Arcadia, CA
ZIP code 91077	2.0 mi	Arcadia, CA
ZIP code 91107	2.3 mi	Pasadena, CA
ZIP code 91006	2.7 mi	Arcadia, CA
ZIP code 91007	2.8 mi	Arcadia, CA
ZIP code 91016	3.2 mi	Monrovia, CA
ZIP code 91017	3.2 mi	Monrovia, 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 91024, plotted from its record coordinates.

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

Scope ZIP code 91024. 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.