ZIP Code 12791 — Youngsville, NY
12791 is a standard (street delivery) ZIP code serving Youngsville, New York, in Sullivan 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 12791 at a glance
| ZIP code | 12791 |
|---|---|
| Primary city | Youngsville |
| State | New York (NY) |
| County | Sullivan FIPS 36105 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 763 |
| Coordinates | 41.811260, -74.886920 |
How ZIP+4 works in 12791
The four digits after the hyphen encode a delivery segment inside 12791. 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 12791 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 12791.
| ZIP | City | Distance |
|---|---|---|
| 12748 | Jeffersonville, NY | 2.9 mi |
| 12787 | White Sulphur Springs, NY | 2.9 mi |
| 12724 | Callicoon Center, NY | 3.8 mi |
| 12766 | North Branch, NY | 4.8 mi |
| 12783 | Swan Lake, NY | 5.6 mi |
| 12767 | Obernburg, NY | 6.2 mi |
| 12750 | Kenoza Lake, NY | 6.5 mi |
| 12736 | Fremont Center, NY | 7.4 mi |
| 12745 | Hortonville, NY | 7.4 mi |
| 12723 | Callicoon, NY | 7.6 mi |
| 12754 | Liberty, NY | 7.8 mi |
| 12734 | Ferndale, NY | 8.6 mi |
Questions about 12791
What is the ZIP+4 code for 12791?
12791 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 12791, you need to look up a specific street address to get them.
What city is 12791?
12791 is assigned to Youngsville, New York, in Sullivan 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.