ZIP Code 85173 — Superior, AZ
85173 is a standard (street delivery) ZIP code serving Superior, Arizona, in Pinal 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 85173 at a glance
| ZIP code | 85173 |
|---|---|
| Primary city | Superior |
| State | Arizona (AZ) |
| County | Pinal FIPS 04021 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Phoenix |
| Population | 2,600 |
| Coordinates | 33.268270, -111.136510 |
How ZIP+4 works in 85173
The four digits after the hyphen encode a delivery segment inside 85173. 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 85173 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 85173.
| ZIP | City | Distance |
|---|---|---|
| 85539 | Miami, AZ | 12.8 mi |
| 85137 | Kearny, AZ | 13.9 mi |
| 85118 | Gold Canyon, AZ | 15.1 mi |
| 85545 | Roosevelt, AZ | 18.6 mi |
| 85532 | Claypool, AZ | 19.4 mi |
| 85140 | San Tan Valley, AZ | 20.4 mi |
| 85119 | Apache Junction, AZ | 23 mi |
| 85143 | San Tan Valley, AZ | 23.4 mi |
| 85132 | Florence, AZ | 24 mi |
| 85120 | Apache Junction, AZ | 25.9 mi |
| 85191 | Valley Farms, AZ | 26.5 mi |
| 85135 | Hayden, AZ | 27.6 mi |
Questions about 85173
What is the ZIP+4 code for 85173?
85173 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 85173, you need to look up a specific street address to get them.
What city is 85173?
85173 is assigned to Superior, Arizona, in Pinal 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.