ZIP Code 85737 — Tucson, AZ
85737 is a standard (street delivery) ZIP code serving Tucson, Arizona, in Pima 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 85737 at a glance
| ZIP code | 85737 |
|---|---|
| Primary city | Tucson |
| State | Arizona (AZ) |
| County | Pima FIPS 04019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Phoenix |
| Population | 22,785 |
| Coordinates | 32.414250, -110.946830 |
How ZIP+4 works in 85737
The four digits after the hyphen encode a delivery segment inside 85737. 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 85737 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 Tucson
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 85737.
| ZIP | City | Distance |
|---|---|---|
| 85755 | Tucson, AZ | 4.2 mi |
| 85704 | Tucson, AZ | 5.7 mi |
| 85742 | Tucson, AZ | 6.3 mi |
| 85718 | Tucson, AZ | 7.3 mi |
| 85741 | Tucson, AZ | 7.7 mi |
| 85750 | Tucson, AZ | 10 mi |
| 85705 | Tucson, AZ | 10.2 mi |
| 85719 | Tucson, AZ | 11.6 mi |
| 85712 | Tucson, AZ | 11.7 mi |
| 85716 | Tucson, AZ | 11.9 mi |
| 85724 | Tucson, AZ | 12 mi |
| 85654 | Rillito, AZ | 12.1 mi |
Questions about 85737
What is the ZIP+4 code for 85737?
85737 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 85737, you need to look up a specific street address to get them.
What city is 85737?
85737 is assigned to Tucson, Arizona, in Pima 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.