ZIP Code 91950 — National City, CA
91950 is a standard (street delivery) ZIP code serving National City, California, in San Diego County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 91950 at a glance
| ZIP code | 91950 |
|---|---|
| Primary city | National City |
| State | California (CA) |
| County | San Diego FIPS 06073 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Los_Angeles |
| Population | 59,891 |
| Coordinates | 32.669520, -117.093130 |
How ZIP+4 works in 91950
The four digits after the hyphen encode a delivery segment inside 91950. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 91950 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 91950.
| ZIP | City | Distance |
|---|---|---|
| 92136 | San Diego, CA | 2 mi |
| 92113 | San Diego, CA | 2.4 mi |
| 92139 | San Diego, CA | 2.7 mi |
| 91910 | Chula Vista, CA | 2.9 mi |
| 92114 | San Diego, CA | 3.4 mi |
| 92102 | San Diego, CA | 3.5 mi |
| 92155 | San Diego, CA | 4.3 mi |
| 92118 | Coronado, CA | 4.4 mi |
| 92105 | San Diego, CA | 4.7 mi |
| 92134 | San Diego, CA | 4.9 mi |
| 91911 | Chula Vista, CA | 5 mi |
| 91902 | Bonita, CA | 5.1 mi |
Questions about 91950
What is the ZIP+4 code for 91950?
91950 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 91950, you need to look up a specific street address to get them.
What city is 91950?
91950 is assigned to National City, California, in San Diego County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.