ZIP Code 13321 — Clark Mills, NY
13321 is a standard (street delivery) ZIP code serving Clark Mills, New York, in Oneida 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 13321 at a glance
| ZIP code | 13321 |
|---|---|
| Primary city | Clark Mills |
| State | New York (NY) |
| County | Oneida FIPS 36065 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 678 |
| Coordinates | 43.089010, -75.372590 |
How ZIP+4 works in 13321
The four digits after the hyphen encode a delivery segment inside 13321. 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 13321 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 13321.
| ZIP | City | Distance |
|---|---|---|
| 13492 | Whitesboro, NY | 2.9 mi |
| 13490 | Westmoreland, NY | 3.1 mi |
| 13323 | Clinton, NY | 3.3 mi |
| 13417 | New York Mills, NY | 4 mi |
| 13424 | Oriskany, NY | 4.4 mi |
| 13495 | Yorkville, NY | 5 mi |
| 13413 | New Hartford, NY | 5.4 mi |
| 13319 | Chadwicks, NY | 6.9 mi |
| 13476 | Vernon, NY | 7 mi |
| 13501 | Utica, NY | 7.4 mi |
| 13403 | Marcy, NY | 7.6 mi |
| 13328 | Deansboro, NY | 7.9 mi |
Questions about 13321
What is the ZIP+4 code for 13321?
13321 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 13321, you need to look up a specific street address to get them.
What city is 13321?
13321 is assigned to Clark Mills, New York, in Oneida 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.