ZIP Code 10589 — Somers, NY
10589 is a standard (street delivery) ZIP code serving Somers, New York, in Westchester 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 10589 at a glance
| ZIP code | 10589 |
|---|---|
| Primary city | Somers |
| State | New York (NY) |
| County | Westchester FIPS 36119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 7,604 |
| Coordinates | 41.331780, -73.693300 |
How ZIP+4 works in 10589
The four digits after the hyphen encode a delivery segment inside 10589. 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 10589 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 10589.
| ZIP | City | Distance |
|---|---|---|
| 10578 | Purdys, NY | 1.4 mi |
| 10540 | Lincolndale, NY | 1.8 mi |
| 10519 | Croton Falls, NY | 1.9 mi |
| 10505 | Baldwin Place, NY | 2.9 mi |
| 10526 | Goldens Bridge, NY | 3.1 mi |
| 10527 | Granite Springs, NY | 3.8 mi |
| 10536 | Katonah, NY | 4.3 mi |
| 10501 | Amawalk, NY | 4.3 mi |
| 10541 | Mahopac, NY | 4.4 mi |
| 10542 | Mahopac Falls, NY | 4.6 mi |
| 10560 | North Salem, NY | 4.7 mi |
| 10535 | Jefferson Valley, NY | 5.5 mi |
Questions about 10589
What is the ZIP+4 code for 10589?
10589 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 10589, you need to look up a specific street address to get them.
What city is 10589?
10589 is assigned to Somers, New York, in Westchester 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.