| City: | La Mesa, California |
| County: | San Diego County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:38:37 AM |
| Population: | No Population Data |
| Area Codes: | 619 / 858 |
| Classification: | PO Box |
| Coordinates: | 32.7679, -117.0224 |
| Quick Link: |
ZIP code 91943 serves Grossmont Center, a major shopping mall in La Mesa, California. This isn't a residential ZIP. It's a point location within ZIP 91942 that provides PO Box services exclusively for mall businesses and related commercial operations.
The post office maintains 201 PO Boxes here, along with 158 business delivery points. All 42 ZIP+4 records point to a single address: Grossmont Center Drive with unit designators. That structure confirms this ZIP exists to serve the shopping center rather than a surrounding community.
La Mesa residents don't live in 91943. They use neighboring ZIPs like 91941 or 91942 for home mail delivery. This ZIP exists because large retail complexes need their own postal infrastructure to handle high mail volumes from dozens of stores, restaurants, and service businesses.
Grossmont Center sits in eastern San Diego County, near Casa de Oro-Mount Helix, Lake Murray, and El Cajon. It's a regional shopping destination anchoring the commercial heart of La Mesa.
Single street address with unit numbers for individual mall tenants.
ZIP Code 91943 supports both business and residential activity. According to the Business Census (2024), there are 6 business establishments, employing about 12 people with an annual payroll of $500,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 4,078Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 6Source: CBP |
| 1st Quarter Payroll: | $118,000Source: CBP |
| Annual Payroll: | $500,000Source: CBP |
| # of Employees: | 12Source: CBP |
ZIP Code 91943 is located in San Diego County, California, within the San Diego-Chula Vista-Carlsbad, CA Metropolitan Statistical Area (CBSA 41740) and California's 51st Congressional District. This Metro area has a population of 3,095,313 people, about 0.00% of whom live in ZIP Code 91943. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | San Diego-Chula Vista-Carlsbad, CASource: Census |
| CBSA Number: | 41740Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 3,095,313Source: Census |
| MSA: | San Diego, CA MSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 51Source: USPS |
| Congressional Land Area: | 4791.61 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0640004Source: Census |
| Place Name: | La Mesa city; CaliforniaSource: Census |
We could not locate which school district 91943 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.