ZIP Code 13021 — Auburn, NY
13021 is a standard (street delivery) ZIP code serving Auburn, New York, in Cayuga 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 13021 at a glance
| ZIP code | 13021 |
|---|---|
| Primary city | Auburn |
| State | New York (NY) |
| County | Cayuga FIPS 36011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 37,247 |
| Coordinates | 42.917130, -76.554200 |
How ZIP+4 works in 13021
The four digits after the hyphen encode a delivery segment inside 13021. 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 13021 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 Auburn
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 13021.
| ZIP | City | Distance |
|---|---|---|
| 13024 | Auburn, NY | 1.6 mi |
| 13119 | Mottville, NY | 6.9 mi |
| 13034 | Cayuga, NY | 7.1 mi |
| 13153 | Skaneateles Falls, NY | 7.3 mi |
| 13160 | Union Springs, NY | 8 mi |
| 13152 | Skaneateles, NY | 8.7 mi |
| 13147 | Scipio Center, NY | 9.9 mi |
| 13060 | Elbridge, NY | 10 mi |
| 13117 | Montezuma, NY | 10.1 mi |
| 13166 | Weedsport, NY | 10.7 mi |
| 13140 | Port Byron, NY | 11.1 mi |
| 13148 | Seneca Falls, NY | 11.5 mi |
Questions about 13021
What is the ZIP+4 code for 13021?
13021 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 13021, you need to look up a specific street address to get them.
What city is 13021?
13021 is assigned to Auburn, New York, in Cayuga 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.