ZIP Code 91759

91759 is one of California's ZIP codes, delivering to addresses in Mount Baldy, Los Angeles County.

City: Mount Baldy
County: Los Angeles County
State: California
Prefix: 917xx

Where this code sits

91759 is part of the 917xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mount Baldy.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 91759 delivers to without sharing its boundary.

ZIP codes nearest 91759

The ZIP codes whose reference points sit closest to 91759.
ZIP code	Distance	Delivers to
ZIP code 91784	6.6 mi	Upland, CA
ZIP code 91701	7.6 mi	Rancho Cucamonga, CA
ZIP code 91737	7.7 mi	Rancho Cucamonga, CA
ZIP code 92358	8.2 mi	Lytle Creek, CA
ZIP code 91785	8.4 mi	Upland, CA
ZIP code 91786	8.4 mi	Upland, CA
ZIP code 92397	9.0 mi	Wrightwood, CA
ZIP code 91739	9.3 mi	Rancho Cucamonga, 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 91759, plotted from its record coordinates.

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

Scope ZIP code 91759. 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.