ZIP Code 17366 — Windsor, PA
17366 is a standard (street delivery) ZIP code serving Windsor, Pennsylvania, in York 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 17366 at a glance
| ZIP code | 17366 |
|---|---|
| Primary city | Windsor |
| State | Pennsylvania (PA) |
| County | York FIPS 42133 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 6,392 |
| Coordinates | 39.931840, -76.555850 |
How ZIP+4 works in 17366
The four digits after the hyphen encode a delivery segment inside 17366. 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 17366 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 17366.
| ZIP | City | Distance |
|---|---|---|
| 17356 | Red Lion, PA | 2.7 mi |
| 17317 | East Prospect, PA | 3.2 mi |
| 17368 | Wrightsville, PA | 4.1 mi |
| 17322 | Felton, PA | 5.4 mi |
| 17402 | York, PA | 5.8 mi |
| 17313 | Dallastown, PA | 6.3 mi |
| 17309 | Brogue, PA | 6.9 mi |
| 17582 | Washington Boro, PA | 7 mi |
| 17406 | York, PA | 7.2 mi |
| 17512 | Columbia, PA | 8.3 mi |
| 17403 | York, PA | 8.3 mi |
| 17407 | York, PA | 8.9 mi |
Questions about 17366
What is the ZIP+4 code for 17366?
17366 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 17366, you need to look up a specific street address to get them.
What city is 17366?
17366 is assigned to Windsor, Pennsylvania, in York 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.