ZIP Code 12589 — Wallkill, NY
12589 is a standard (street delivery) ZIP code serving Wallkill, New York, in Ulster 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 12589 at a glance
| ZIP code | 12589 |
|---|---|
| Primary city | Wallkill |
| State | New York (NY) |
| County | Ulster FIPS 36111 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 18,646 |
| Coordinates | 41.627800, -74.158750 |
How ZIP+4 works in 12589
The four digits after the hyphen encode a delivery segment inside 12589. 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 12589 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 12589.
| ZIP | City | Distance |
|---|---|---|
| 12548 | Modena, NY | 3.8 mi |
| 12525 | Gardiner, NY | 3.8 mi |
| 12586 | Walden, NY | 4.3 mi |
| 12515 | Clintondale, NY | 6.1 mi |
| 12550 | Newburgh, NY | 8.4 mi |
| 12542 | Marlboro, NY | 8.5 mi |
| 12549 | Montgomery, NY | 8.5 mi |
| 12566 | Pine Bush, NY | 9 mi |
| 12547 | Milton, NY | 9.2 mi |
| 12561 | New Paltz, NY | 9.4 mi |
| 12575 | Rock Tavern, NY | 9.8 mi |
| 12543 | Maybrook, NY | 10.3 mi |
Questions about 12589
What is the ZIP+4 code for 12589?
12589 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 12589, you need to look up a specific street address to get them.
What city is 12589?
12589 is assigned to Wallkill, New York, in Ulster 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.