ZIP Code 06390 — Fishers Island, NY
06390 is a standard (street delivery) ZIP code serving Fishers Island, New York, in Suffolk 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 06390 at a glance
| ZIP code | 06390 |
|---|---|
| Primary city | Fishers Island |
| State | New York (NY) |
| County | Suffolk FIPS 36103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 72 |
| Coordinates | 41.270270, -71.988860 |
How ZIP+4 works in 06390
The four digits after the hyphen encode a delivery segment inside 06390. 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 06390 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 06390.
| ZIP | City | Distance |
|---|---|---|
| 06340 | Groton, CT | 6.6 mi |
| 06355 | Mystic, CT | 6.8 mi |
| 06320 | New London, CT | 8.1 mi |
| 06378 | Stonington, CT | 8.5 mi |
| 06379 | Pawcatuck, CT | 9.5 mi |
| 06385 | Waterford, CT | 10.5 mi |
| 06335 | Gales Ferry, CT | 11.6 mi |
| 06375 | Quaker Hill, CT | 11.7 mi |
| 02891 | Westerly, RI | 11.9 mi |
| 06339 | Ledyard, CT | 12 mi |
| 06357 | Niantic, CT | 12.4 mi |
| 06338 | Mashantucket, CT | 13.4 mi |
Questions about 06390
What is the ZIP+4 code for 06390?
06390 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 06390, you need to look up a specific street address to get them.
What city is 06390?
06390 is assigned to Fishers Island, New York, in Suffolk 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.