| City: | National City, California |
| County: | San Diego County |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 9:38:42 AM |
| Population: | No Population Data |
| Area Codes: | 619 / 858 |
| Classification: | PO Box |
| Coordinates: | 32.6784, -117.0986 |
| Quick Link: |
ZIP code 91951 serves as a dedicated PO Box facility within National City, California, part of the greater San Diego metropolitan area. This isn't a standalone community with its own territory. It's a point location enclosed entirely within ZIP 91950, which handles the residential and commercial street delivery for National City. The post office at this location maintains 1,015 PO Boxes and serves 160 businesses.
National City sits between San Diego to the north and Chula Vista to the south, making it a densely populated urban corridor. The single street address associated with this ZIP (E 16th St) is the post office's physical location. Residents who prefer PO Box service over street delivery can rent boxes here, though street delivery is available throughout National City via the neighboring 91950 ZIP. Nearby neighborhoods include Shelltown, Barrio Logan, and Southeastern San Diego, all within about a mile of this post office.
Mail addressed to 91951 goes exclusively to PO Box holders. For street delivery in National City, use ZIP 91950 instead.
Only one street appears in this ZIP, which is the post office's physical address on E 16th Street.
ZIP Code 91951 supports both business and residential activity. According to the Business Census (2024), there are 6 business establishments, employing about 96 people with an annual payroll of $3,320,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 5,957Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 6Source: CBP |
| 1st Quarter Payroll: | $722,000Source: CBP |
| Annual Payroll: | $3,320,000Source: CBP |
| # of Employees: | 96Source: CBP |
ZIP Code 91951 is located in San Diego County, California, within the San Diego-Chula Vista-Carlsbad, CA Metropolitan Statistical Area (CBSA 41740) and California's 52nd Congressional District. This Metro area has a population of 3,095,313 people, about 0.00% of whom live in ZIP Code 91951. 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: | 52Source: USPS |
| Congressional Land Area: | 267 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0650398Source: Census |
| Place Name: | National City city; CaliforniaSource: Census |
We could not locate which school district 91951 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.