ZIP Code 11947 — Jamesport, NY
11947 is a standard (street delivery) ZIP code serving Jamesport, 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 11947 at a glance
| ZIP code | 11947 |
|---|---|
| Primary city | Jamesport |
| State | New York (NY) |
| County | Suffolk FIPS 36103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 148 |
| Coordinates | 40.943020, -72.581890 |
How ZIP+4 works in 11947
The four digits after the hyphen encode a delivery segment inside 11947. 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 11947 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 11947.
| ZIP | City | Distance |
|---|---|---|
| 11970 | South Jamesport, NY | 0.5 mi |
| 11948 | Laurel, NY | 2 mi |
| 11931 | Aquebogue, NY | 2.2 mi |
| 11901 | Riverhead, NY | 3.6 mi |
| 11952 | Mattituck, NY | 4.2 mi |
| 11946 | Hampton Bays, NY | 5.9 mi |
| 11956 | New Suffolk, NY | 6.4 mi |
| 11942 | East Quogue, NY | 6.5 mi |
| 11935 | Cutchogue, NY | 7.1 mi |
| 11959 | Quogue, NY | 8 mi |
| 11978 | Westhampton Beach, NY | 8.6 mi |
| 11968 | Southampton, NY | 8.9 mi |
Questions about 11947
What is the ZIP+4 code for 11947?
11947 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 11947, you need to look up a specific street address to get them.
What city is 11947?
11947 is assigned to Jamesport, 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.