ZIP Code 91377

91377 is one of California's ZIP codes, delivering to addresses in Oak Park, Ventura County.

City: Oak Park
County: Ventura County
State: California
Prefix: 913xx

Where this code sits

91377 is part of the 913xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Oak Park.

Oak Park California ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 91377 delivers to without sharing its boundary.

ZIP codes nearest 91377

The ZIP codes whose reference points sit closest to 91377.
ZIP code	Distance	Delivers to
ZIP code 91362	3.3 mi	Thousand Oaks, CA
ZIP code 91376	3.4 mi	Agoura Hills, CA
ZIP code 91359	3.5 mi	Westlake Village, CA
ZIP code 91358	4.2 mi	Thousand Oaks, CA
ZIP code 91301	4.3 mi	Agoura Hills, CA
ZIP code 91361	4.8 mi	Westlake Village, CA
ZIP code 93065	5.6 mi	Simi Valley, CA
ZIP code 93062	5.9 mi	Simi Valley, 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 91377, plotted from its record coordinates.

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

Scope ZIP code 91377. 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.