ZIP Code 85303 — Glendale, AZ
85303 is a standard (street delivery) ZIP code serving Glendale, Arizona, in Maricopa 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 85303 at a glance
| ZIP code | 85303 |
|---|---|
| Primary city | Glendale |
| State | Arizona (AZ) |
| County | Maricopa FIPS 04013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Phoenix |
| Population | 33,663 |
| Coordinates | 33.533980, -112.220840 |
How ZIP+4 works in 85303
The four digits after the hyphen encode a delivery segment inside 85303. 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 85303 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.
Other ZIP codes in Glendale
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 85303.
| ZIP | City | Distance |
|---|---|---|
| 85305 | Glendale, AZ | 2 mi |
| 85301 | Glendale, AZ | 2.5 mi |
| 85033 | Phoenix, AZ | 2.8 mi |
| 85345 | Peoria, AZ | 3.1 mi |
| 85302 | Glendale, AZ | 3.4 mi |
| 85037 | Phoenix, AZ | 3.9 mi |
| 85031 | Phoenix, AZ | 4 mi |
| 85035 | Phoenix, AZ | 4.5 mi |
| 85019 | Phoenix, AZ | 4.8 mi |
| 85304 | Glendale, AZ | 4.9 mi |
| 85307 | Glendale, AZ | 5.1 mi |
| 85051 | Phoenix, AZ | 5.3 mi |
Questions about 85303
What is the ZIP+4 code for 85303?
85303 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 85303, you need to look up a specific street address to get them.
What city is 85303?
85303 is assigned to Glendale, Arizona, in Maricopa 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.