ZIP Code 92040

92040 is one of California's ZIP codes, delivering to addresses in Lakeside, San Diego County.

City: Lakeside
County: San Diego County
State: California
Prefix: 920xx

Where this code sits

92040 is part of the 920xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lakeside.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 92040 delivers to without sharing its boundary.

ZIP codes nearest 92040

The ZIP codes whose reference points sit closest to 92040.
ZIP code	Distance	Delivers to
ZIP code 92021	2.7 mi	El Cajon, CA
ZIP code 92072	3.4 mi	Santee, CA
ZIP code 92071	3.9 mi	Santee, CA
ZIP code 92022	4.9 mi	El Cajon, CA
ZIP code 92020	5.1 mi	El Cajon, CA
ZIP code 92019	5.4 mi	El Cajon, CA
ZIP code 92119	7.1 mi	San Diego, CA
ZIP code 91942	7.6 mi	La Mesa, 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 92040, plotted from its record coordinates.

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

Scope ZIP code 92040. 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.