ZIP Code 13640 — Wellesley Island, NY
13640 is a standard (street delivery) ZIP code serving Wellesley Island, New York, in Jefferson 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 13640 at a glance
| ZIP code | 13640 |
|---|---|
| Primary city | Wellesley Island |
| State | New York (NY) |
| County | Jefferson FIPS 36045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 318 |
| Coordinates | 44.319800, -75.999370 |
How ZIP+4 works in 13640
The four digits after the hyphen encode a delivery segment inside 13640. 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 13640 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 13640.
| ZIP | City | Distance |
|---|---|---|
| 13692 | Thousand Island Park, NY | 2.5 mi |
| 13641 | Fishers Landing, NY | 3.2 mi |
| 13607 | Alexandria Bay, NY | 4.4 mi |
| 13675 | Plessis, NY | 8.3 mi |
| 13624 | Clayton, NY | 8.3 mi |
| 13656 | La Fargeville, NY | 9.2 mi |
| 13679 | Redwood, NY | 11.6 mi |
| 13691 | Theresa, NY | 12.5 mi |
| 13632 | Depauville, NY | 13.7 mi |
| 13623 | Chippewa Bay, NY | 15.1 mi |
| 13622 | Chaumont, NY | 16.4 mi |
| 13673 | Philadelphia, NY | 17.1 mi |
Questions about 13640
What is the ZIP+4 code for 13640?
13640 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 13640, you need to look up a specific street address to get them.
What city is 13640?
13640 is assigned to Wellesley Island, New York, in Jefferson 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.