ZIP Code 91723

91723 is one of California's ZIP codes, delivering to addresses in Covina, Los Angeles County.

City: Covina
County: Los Angeles County
State: California
Prefix: 917xx

Where this code sits

91723 is part of the 917xx range, the group of codes handled by one mail processing centre. Covina is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Covina page.

Covina California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 91723 delivers to without sharing its boundary.

626 Area code 626

ZIP codes nearest 91723

The ZIP codes whose reference points sit closest to 91723.
ZIP code	Distance	Delivers to
ZIP code 91722	1.5 mi	Covina, CA
ZIP code 91791	1.6 mi	West Covina, CA
ZIP code 91724	1.7 mi	Covina, CA
ZIP code 91702	2.9 mi	Azusa, CA
ZIP code 91790	3.3 mi	West Covina, CA
ZIP code 91793	3.4 mi	West Covina, CA
ZIP code 91740	3.4 mi	Glendora, CA
ZIP code 91773	4.0 mi	San Dimas, 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 91723, plotted from its record coordinates.

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

Scope ZIP code 91723. 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.