ZIP Code 11590 — Westbury, NY
11590 is a standard (street delivery) ZIP code serving Westbury, New York, in Nassau 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 11590 at a glance
| ZIP code | 11590 |
|---|---|
| Primary city | Westbury |
| State | New York (NY) |
| County | Nassau FIPS 36059 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 47,599 |
| Coordinates | 40.755410, -73.574630 |
How ZIP+4 works in 11590
The four digits after the hyphen encode a delivery segment inside 11590. 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 11590 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 11590.
| ZIP | City | Distance |
|---|---|---|
| 11514 | Carle Place, NY | 2 mi |
| 11568 | Old Westbury, NY | 2.5 mi |
| 11556 | Uniondale, NY | 2.5 mi |
| 11554 | East Meadow, NY | 2.6 mi |
| 11801 | Hicksville, NY | 2.7 mi |
| 11549 | Hempstead, NY | 2.8 mi |
| 11753 | Jericho, NY | 2.9 mi |
| 11501 | Mineola, NY | 3.4 mi |
| 11596 | Williston Park, NY | 3.5 mi |
| 11553 | Uniondale, NY | 3.6 mi |
| 11756 | Levittown, NY | 3.7 mi |
| 11530 | Garden City, NY | 3.8 mi |
Questions about 11590
What is the ZIP+4 code for 11590?
11590 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 11590, you need to look up a specific street address to get them.
What city is 11590?
11590 is assigned to Westbury, New York, in Nassau 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.