ZIP Code 85204 — Mesa, AZ
85204 is a standard (street delivery) ZIP code serving Mesa, 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 85204 at a glance
| ZIP code | 85204 |
|---|---|
| Primary city | Mesa |
| State | Arizona (AZ) |
| County | Maricopa FIPS 04013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Phoenix |
| Population | 65,155 |
| Coordinates | 33.396660, -111.787860 |
How ZIP+4 works in 85204
The four digits after the hyphen encode a delivery segment inside 85204. 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 85204 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 Mesa
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 85204.
| ZIP | City | Distance |
|---|---|---|
| 85210 | Mesa, AZ | 3.2 mi |
| 85233 | Gilbert, AZ | 3.3 mi |
| 85234 | Gilbert, AZ | 3.6 mi |
| 85213 | Mesa, AZ | 3.7 mi |
| 85203 | Mesa, AZ | 3.8 mi |
| 85206 | Mesa, AZ | 4 mi |
| 85201 | Mesa, AZ | 4.4 mi |
| 85205 | Mesa, AZ | 4.7 mi |
| 85296 | Gilbert, AZ | 5 mi |
| 85202 | Mesa, AZ | 5.1 mi |
| 85225 | Chandler, AZ | 6 mi |
| 85236 | Higley, AZ | 6.4 mi |
Questions about 85204
What is the ZIP+4 code for 85204?
85204 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 85204, you need to look up a specific street address to get them.
What city is 85204?
85204 is assigned to Mesa, 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.