ZIP Code 13664 — Morristown, NY
13664 is a standard (street delivery) ZIP code serving Morristown, New York, in St. Lawrence 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 13664 at a glance
| ZIP code | 13664 |
|---|---|
| Primary city | Morristown |
| State | New York (NY) |
| County | St. Lawrence FIPS 36089 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 384 |
| Coordinates | 44.584230, -75.645370 |
How ZIP+4 works in 13664
The four digits after the hyphen encode a delivery segment inside 13664. 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 13664 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 13664.
| ZIP | City | Distance |
|---|---|---|
| 13614 | Brier Hill, NY | 4.3 mi |
| 13669 | Ogdensburg, NY | 8.5 mi |
| 13654 | Heuvelton, NY | 9.2 mi |
| 13646 | Hammond, NY | 10.1 mi |
| 13633 | De Peyster, NY | 10.4 mi |
| 13623 | Chippewa Bay, NY | 10.7 mi |
| 13680 | Rensselaer Falls, NY | 15.6 mi |
| 13681 | Richville, NY | 17.2 mi |
| 13630 | De Kalb Junction, NY | 17.2 mi |
| 13679 | Redwood, NY | 18.7 mi |
| 13642 | Gouverneur, NY | 19.8 mi |
| 13658 | Lisbon, NY | 21 mi |
Questions about 13664
What is the ZIP+4 code for 13664?
13664 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 13664, you need to look up a specific street address to get them.
What city is 13664?
13664 is assigned to Morristown, New York, in St. Lawrence 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.